四年级四则混合运算练习题41523
ktv舞王-秦康
四年级四则混合运算练习题
(1)1533÷73+159-57=
(2) 83×91÷131+38=
(3) 197-46+67-13=
(4) 1512÷54×126-52=
(5) 192+52×136÷66=
(6) 123-47+159-16=
(7) 164×23-126+74=
(8) 117+21+17-19=
(9) 81÷9×161+93=
(10) 93×35-128+36=
(11) 86×9+87×99=9387
(12) 2324÷83-108÷54=26
(13)
3348÷93+15-17=34
(14) 51+1414÷14-90=62
(15) 42+31×180+42= 5664
(16)
17×25-2050÷82= 400
(17) 552÷12×18-66= 762
(18) 1118-18÷2×109= 137
(19) 916-952÷17×5=
636
(20) 1044÷29-540÷45= 24
(21)
23+15+925÷37=
(22) 52+770÷22-22=
(23)
88×51+800÷40=
(112-13)×(103-12)=
(25) 56×7-66÷22=
(31)
(151+49)÷(7+93)=
(32) 32÷(56÷7)×18=
(33)
199-(21+70)-22=
(34) 14×5÷(34-33)=
(35)
840÷(125-90)+67=
(26)
109×66-29×10=
(27) 339+55-166-52=
110÷55×102÷51=
(29) 71+42×50-92=
(30) 92÷4-194÷97=
124-(170-48)÷61=
(37)2058÷98-(86-66)=
(38) (76+485)÷51+91=
(39) (91-22)÷69+27=
(40) (50+20)×88÷56=
(41) 1157÷(128-39)×54
(42) 18×58+(73-17)
(43) 757-7168÷2÷64
(44)
98-98×12÷14
(45) 80×12÷15-64
(46)
298-15×15-1
(47) 128+2184÷42-66
(48)
73×(66+34)-21
(49) 75×3+768÷24=
(50) 71-51+199-83=
(51) 161-8+33×2=
(52) 182÷71÷82-9=
(53) 141+5+144×12=
(54) 193÷20÷123÷55=
(55) 142÷50×169+36=
(56) 132+70×156÷38=
(57) 108×21-83×55=
(58) 122×9+62+58=
(59) 53÷40×81÷71=
(60) 28+53-11-25=
(61) =
(62)
112÷82×122-81=
(63) 174-4×101-61=
(64)
77÷59-103-33=
(65) 171+56÷55÷73=
(66)
121-56-110×67=
(67) 86×22-59+9=
(68) 185÷79×189-80=
(69) 28÷33÷151×54=
(70) 4×96+132×5=
(71) 72-20-87-67=
(72) 158+56×124+31=
(73) 113-35×194-3=
(74) 119+19+194-34=
(75) 112-77÷17÷39=
(76) 102-78÷65×1=
(77) 154×17×167×98=
(78) 120×88÷2÷48=
(79) 88-22×179-78=
(80) 25+86×67+55=
(81) 184×81+151-69=
(82) 165+21÷164+85=
(83) 181÷32+4÷87=
(84) 31×72×89×11=
(85) 134+82+126÷92=
(86) 109×82+184÷37=
(87) 71×36+25-20=
(88) 128-75-185+32=
(89) 36+22-175+97=
(90) 109-87-70×45=
(91) 141+12×71÷78=
(92) 21-87÷111×35=
(93)
19×53×77-61=
(94) 22+4÷127-97=
(95)
71-87×75÷17=
(96) 116÷48-125÷86=
(97)
117+79×116÷13=
(98) 2+45-161÷38=
(99)
44×40-68×38=
(100) 121+49+183×99=
(101)
59+54+71×29=
(102) 108-77×80÷55=
(103)
139÷99×180+94=
(104) 41÷30÷139+43=
(105)
78+79+24×39=
(106) 94÷17×89+89=
(107)
138-43÷44÷89=
(108) 182÷81-152÷30=
(109)
103+10+156-21=
(110) 17×29×95×33=
(111)
124+98-191+77=
(112) 152÷45+77×27=
(113)
168÷48+149÷3=
(114) 34×28÷103÷25=
(115)
75×45+50×60=
(116) 55-11÷70÷49=
(117) 3÷47÷184×61=
(118)
200+81÷20×56=
(119) 75÷10-155-90=
(120)
98×19-188+63=
(121) 38+10+141+27=
(122)
72÷5+53÷68=
(123) 105÷71-136+73=
(124)
188-60+187×83=
(125) 6-89×3÷77=
(126)
106÷62×107-51=
(127) 44÷57-125÷60=
(128)
131÷75÷122-76=
(129) 138÷89+51+39=
(130)
59×71-188÷46=
(131) 76+46+152×54=
(132)
32-56+152×57=
(133) 165÷62-65÷91=
(134)
186×95×4+43=
(135) 81×67÷149+10=
(136)
99×41×130+92=
(137) 118-12-128+62=
(138)
44-52-160÷82=
(139) 39×96×147-28=
(140)
37-23+15÷96=
(141) 128÷90×19×30=
(142) 89-7×162+55=
(143)
34-63+77-64=
(144) 53+41+62+36=
(145)
27×3+22÷23=
(146) 78+73+17+2=
(147)
45÷45÷172×20=
(148) 53+85-27÷26=
(149)
146×99×116×18=
(150) 66-19÷31-14=
(151)
154-70-161×49=
(152) 44÷98÷166+31=
(153)
116-85×183-44=
(154) 10-59+11+30=
(155)
143÷18+76×55=
(156) 130+70-37×69=
(157)
68-14-4×80=
(158) 166÷59÷61-43=
(159)
92×16÷49-90=
(160) 120×40-95÷5=
(161)
34×87-61×53=
(162) 90+35+190÷91=
(163)
183÷40÷110÷58=
(164) 118×99-96×52=
(165)
145+58×135×42=
(166) 39÷52÷103-68=
(167) 97÷22÷192×12=
(168)
132+90×96÷79=
(169) 33÷32-107+73=
(170)
169×26×5×13=
(171) 15-37+124+54=
(172)
67×2+53÷1=
(173) 27+59÷158+27=
(174)
136+22÷5-15=
(175) 19÷15×39÷38=
(176)
130-74×21×82=
(177) 161÷44÷170+31=
(178)
97-56+106×17=
(179) 90-33-168+68=
(180)
27×98-158÷39=
(181) 164÷39+123÷62=
(182)
106×93-17÷8=
(183) 109+19-42+95=
(184)
164÷17×120÷37=
(185) 68+49+99÷49=
(186)
122×51-144+29=
(187) 57-52÷91÷25=
(188)
48÷17-62×92=
(189) 5×26+80÷71=
(190)
200-93-191+71=
(191) 15÷61-48÷9=
(192) 84-42×42+69=
(193)
6+72×147×55=
(194) 97-36+167×75=
(195)
165+22-144-50=
(196) 179-81÷14×85=
(197)
1×42-80×79=
(198) 68+45-176-31=
(199)
189-64÷110-2=
(200) 140×76+37×5=
(201)
23×39-161×72=
(202) 69÷36+26+80=
(203)
66×65÷177-67=
(204) 72÷18×65÷43=
(205)
2×15+171+12=
(206) 158÷74×22×12=
(207)
80×54+76×1=
(208) 182×45-156×66=
(209)
169-72×192÷26=
(210) 90×75+171÷68=
(211)
10-8÷39÷4=
(212) 176+49÷65×90=
(213)
57×67×5×93=
(214) 122×6+179-39=
(215)
138-55-197+29=
(216) 60×71×48-80=
(217) 96-99×91+42=
(218)
10÷80+52+65=
(219) 45+74+181+81=
(220) =
(221) 17-25÷31×49=
(222) 10+65-96÷37=
(223) 13-93×123+14=
(224) 23÷81+164+72=
(225) 52×45×107+44=
(226) 78×75-119+95=
(227) 23÷90÷53-29=
(228) 16-1÷108-55=
(229) 132-14-99+5=
(230) 71+76-25+32=
(231) 155+93×103×79=
(232) 123÷1÷153+66=
(233) 88÷33+90-58=
(234) 145+84+21-85=
(235) 192÷80+104+68=
(236) 52÷71×53-22=
(237) 51×57-60-83=
(238) 155-65×14×47=
(239) 15÷80-188÷49=
(240) 9×53×65÷87=
(241) 53+89+90+9=
(242)
59÷33×10÷58=
(243) 4×70-186+26=
(244)
99-37-146-79=
(245) 25×81÷162×12=
(246)
113×56-115×9=
(247) 42÷78+28×50=
(248)
130-64+151+61=
(249) 198×38÷158-22=
(250) 73÷47-135÷39=
回答人的补充 2009-07-22
10:13
(251) 108+84×146÷27=
(252)
7÷25÷37+51=
(253) 104×12-57-15=
(254)
194-74×176-41=
(255) 86-14÷72-7=
(256)
138-59÷61+13=
(257) 173÷6×142÷21=
(258)
34×51+45×54=
(259) 155÷47+37÷95=
(260)
27÷58-177÷62=
(261) 137×72+194÷17=
(262)
49+45÷48÷69=
(263) 197×11-171+44=
(264)
81+62+44×66=
(265) 28×16÷94-32=
(266) 195+70-192×28=
(267)
193÷84-107÷56=
(268) 7×62÷16+39=
(269)
176+87+23÷43=
(270) 127×92+182×20=
(271)
25×94-175×86=
(272) 10-98+150×47=
(273)
12-93×63-79=
(274) 3÷29×24÷85=
(275)
74-21×7×36=
(276) 198-62×2÷6=
(277)
68+84+195+19=
(278) 79-43÷26÷15=
(279)
21÷89×134-59=
(280) 176÷94+30-80=
(281)
176×64+99+88=
(282) 110÷52÷193×51=
(283)
47×81÷186+58=
(284) 50-84÷188×86=
(285)
66+86×158÷68=
(286) 154÷21-31÷82=
(287)
34×22+97-87=
(288) 27÷73+133+90=
(289)
170+53×53÷84=
(290) 166×65+147+50=
(291) 162+90-96×49=
(292)
13×52+21-8=
(293) 18+19×164÷17=
(294)
2÷50×47×45=
(295) 114+16÷114+96=
(296)
14+61×109+4=
(297) 43×84-173÷92=
(298)
20+92+137×8=
(299) 69+74×185-33=
(300)
137×90-153×93=
(301) 175×6+62÷89=
(302)
74÷58+124×29=
(303) 111×96×37×11=
(304)
187-82+9×44=
(305) 46+84÷111-37=
(306)
122×61÷14×49=
(307) 19-58×103×34=
(308)
71-26+34-69=
(309) 187÷74+102+13=
(310)
20+67÷112÷59=
(311) 75-88+114-55=
(312)
196-62-83×36=
(313) 28÷77+116-43=
(314)
123×93×26+99=
(315) 60×65÷101×78=
(316) 67-81+113÷60=
(317)
103÷48+134×9=
(318) 89÷5-61+61=
(319)
56-18÷196×55=
(320) 91÷26×180÷6=
(321)
41+88-38-36=
(322) 72-16×24-83=
(323)
44÷22×29×90=
(324) 174÷83-40×90=
(325)
174+52+9×5=
(326) 131×93×21+58=
(327)
105+8-133-36=
(328) 122+97×150-78=
(329)
133+42÷127×41=
(330) 20÷54+58×26=
(331)
20×53×137+95=
(332) 42+57-66÷85=
(333)
49÷12×175-25=
(334) 196+61-41-76=
(335)
71÷85-174+23=
(336) 139÷3-44+77=
(337)
155+64+34-82=
(338) 16-31×178-51=
(339)
38÷83÷74÷19=
(340) 120-26÷40×70=
(341) 180+52÷84-93=
(342)
136÷30+173÷41=
(343) 4÷74×170÷39=
(344)
192÷67÷111÷30=
(345) 156-78÷7÷85=
(346)
111-73÷34×86=
(347) 149÷37÷91×85=
(348)
60×17÷13+70=
(349) 15+97+185×37=
(350)
198+26÷66+76=
(351) 154-1÷170+12=
(352)
130+15×2-59=
(353) 187+11÷98-75=
(354)
154÷5×76×54=
(355) 1+41-38+20=
(356)
110-53÷34÷11=
(357) 4×73-128-79=
(358)
34+75+169-9=
(359) 172×87×26÷64=
(360)
5÷71÷166-90=
(361) 98÷86-156÷77=
(362)
195-52×153×80=
(363) 46×19×165+47=
(364)
121×60×154+15=
(365) 199+5-164+46=
(366) 94+1÷134÷61=
(367)
106×62+186÷22=
(368) 66-61÷54÷49=
(369)
138-30+32+16=
(370) 85+38×117÷91=
(371)
133×95×121×91=
(372) 144+64+22÷10=
(373)
48×17÷141÷62=
(374) 26-30÷9÷60=
(375)
8+48÷101×11=
(376) 162+10÷115÷60=
(377)
159-67÷174÷16=
(378) 74÷89×17÷10=
(379)
112×96÷156÷80=
(380) 27×88÷88-19=
(381)
2÷34+111+53=
(382) 83÷85×46-31=
(383)
127÷70×20+54=
(384) 145+42+199÷49=
(385)
8÷22-34×3=
(386) 10×31×102×62=
(387)
34×47-122+36=
(388) 21×60×3+67=
(389)
110-81×123÷42=
(390) 112-93+93×96=
(391) 113-55÷194+78=
(392)
63×82×157-40=
(393) 138÷19-60×1=
(394)
145÷87-24-73=
(395) 147÷72-67×85=
(396)
176+2-16+81=
(397) 23+85×27-56=
(398)
166÷79÷1-83=
(399) 17÷26÷73÷9=
(400)
167÷57+38+58=
(401) 197+84+104÷36=
(402)
129×83÷31-68=
(403) 103÷95-42×52=
(404)
142×40×178÷85=
(405) 191×69-74÷19=
(406)
92×66÷20-17=
(407) 87×9÷106÷69=
(408)
108+90-93÷29=
(409) 36×43-16+33=
(410)
11-44×175+71=
(411) 151×44×97-62=
(412)
=
(413) 64÷58+112÷56=
(414) 142÷81×1+22=
(415) 175×29+144-84=
(416)
134÷7÷171-77=
(417) 105×19÷44+17=
(418)
42÷94-104-9=
(419) 141-41+81-40=
(420)
107×4÷147+63=
(421) 91-78÷193-92=
(422)
166×49-192÷22=
(423) 130×10÷37-81=
(424)
96+32×123+27=
(425) 53×38×40×12=
(426)
71-60×69÷4=
(427) 123×13+45-11=
(428)
6-80×54+86=
(429) 123-53+166÷53=
(430)
13×94+44×44=
(431) 2-77-35-83=
(432)
44+90-198×5=
(433) 131-26÷52-44=
(434)
148÷66×121×82=
(435) 148-83+38+99=
(436)
116+53×110×99=
(437) 9÷9÷81-62=
(438)
133÷41-7+12=
(439) 41-57÷187×15=
(440)
28+8+46×35=
(441) 189-6÷132÷38=
(442) 124÷36÷108+70=
(443) 64÷78+112-32=
(444) 87+46+164-28=
(445) 200-70÷188+47=
(446) 177-16-130÷50=
(447) 98÷74×144+3=
(448) 98×9÷118×42=
(449) 76+5+129+18=
(450) 48-96-81+91=
(451) 123×23×115÷32=
(452) 168×85×66÷95=
(453) 146÷62÷138-30=
(454) 194÷43+65÷85=
(455) 22+52÷155+71=
(456) 104×18+64÷52=
(457) 43-46×94÷11=
(458) 171×71+90-71=
(459) 174×41×97×25=
(460) 11×96+67÷28=
(461) 97÷9-179×37=
(462) 35-47÷61÷41=
(463) 62-17÷72-45=
(464) 96-61+132×89=
(465) 140÷55×75÷39=
(466) 142+86÷185÷35=
(467)
67-58×110÷35=
(468) 65×4÷16×51=
(469)
102-36-163+93=
(470) 149÷54+168-43=
(471) 70×93÷143×49=
(472) 124+63+175+78=
(473) 16×57-124÷30=
(474) 12÷65×16+7=
(475) 53×1×2÷88=
(476) 179÷31-164+88=
(477) 12+69-139×25=
(478) 186+87+35×17=
(479) 96-7÷18+9=
(480) 37+48-40×45=
(481) 122×77+90×8=
(482) 30-35×33÷13=
(483) 180-91+23÷11=
(484) 5-5×160×65=
(485) 77×33×157÷55=
(486) 197÷73+114÷85=
(487) 188+82×148-48=
(488) 87÷42+179×14=
(489) 108×40-23×96=
(490) 46÷20+85÷76=
(491) 100+56+25+25=
(492)
191×50÷55×8=
(493) 146÷52-68÷10=
(494)
32÷37+53+76=
(495) 198×44+183×94=
(496)
123-69-42÷11=
(497) 24×71+173+22=
(498)
111+43-24+24=
(499) 62×21÷56+58=
(500)
188÷91×98+39=
(501) 71×51×120+13=
(502)
140÷4-104÷13=
(503) 175+17×173÷70=
(504)
194÷55×78÷59=
(505) 119÷95×190+10=
(506)
74+33×99÷80=
(507) 116÷10÷167×34=
(508)
47+53÷139×86=
(509) 99+56÷165×90=
(510)
171-96-115+20=
(511) 169-27+168×2=
(512)
152×25+137×85=
(513) 44÷37+125-83=
(514)
=
(515) 113+48-7-77=
(516)
16+61+29-72=
(517) 83÷91-52×67=
(518)
176÷42-137×24=
(519) 30-99-17÷14=
(520)
45+4+70÷14=
(521) 48-23+27×70=
(522)
96÷5-56+19=
(523) 101÷60-27+14=
(524)
146×41+17+24=
(525) 71+82-31×69=
(526)
4+65×21+48=
(527) 8+58+170+31=
(528)
124+16÷126×69=
(529) 182÷75×146-92=
(530) 55+39-38+51=
(531) 132-71+77×68=
(532) 87÷17×154÷65=
(533) 114÷54÷152×19=
(534) 106×90+15÷19=
(535) 154+28+79×78=
(536) 40-85×156+77=
(537) 96÷21÷132÷77=
(538) 112+37+157×92=
(539) 55-7+7÷65=
(540) 89×14÷89+22=
(541)
61×31-66÷44=
(542) 131÷43+170×61=
(543)
116×35-192-82=
(544) 41÷40-9×63=
(545)
40+85+35-48=
(546) 117-25-61÷66=
(547)
120×91×66+31=
(548) 2×56÷73×18=
(549)
163×38÷22÷67=
(550) 129×48+136+98=
(551)
146÷4÷160÷66=
(552) 178+3÷136-51=
(553)
63-91×106+31=
(554) 121×28+1+99=
(555)
177+50×105×89=
(556) 76-69÷155×78=
(557)
70÷1+70×16=
(558) 151-31-163÷58=
(559)
93+59-32+55=
(560) 101÷98÷186×66=
(561)
16×67÷194-50=
(562) 174+71×28÷16=
(563)
77-9-173×66=
(564) 161÷79+185+30=
(565)
32×44÷60×13=
(566) 46-16÷101+63=
(567) 8×27×59×75=
(568) 60÷53÷10-34=
(569) 149+35÷149+32=
(570) 125÷78+190+41=
(571) 68-91-122-85=
(572) 106÷11+14×94=
(573) 98×92×42×84=
(574) 65÷27+200÷40=
(575) 139-31+91×50=
(576) 105+91+56-78=
(577) 111+21÷21÷99=
(578) 24+76÷138+99=
(579) 2-23×200+72=
(580) 163+87÷92+1=
(581) 119×71-66-55=
(582) 57-91-110×12=
(583) 138÷96-178+6=
(584) 86÷39×177×26=
(585) 153÷49+60+79=
(586) 122-88+122+17=
(587) 128÷29×57-53=
(588) 181+36÷68÷70=
(589) 145÷6÷183+50=
(590) 73×33×80×6=
(591) 54×49+169×67=
(592)
53×20+21+1=
(593) 125×46÷117-95=
(594)
68÷41-192×18=
(595) 96×34-145÷51=
(596)
9÷80+192-31=
(597) 25÷21÷42×94=
(598)
162+77-162+45=
(599) 137-13+115+58=
(600) 56-58-38×27=
(601) 76×36×40×74=
(602) 112×58-198-28=
(603) 157×63-112-92=
(604) 99÷45÷115÷6=
(605) 10÷42×93÷13=
(606) 175+49×5+56=
(607) 37-14+66+6=
(608) 144-81+79÷32=
(609) 57+43-81÷39=
(610) 105÷65×190+70=
(611) 159-42×8×2=
(612) 99-57-86-21=
(613) 150÷92÷186-30=
(614) 161÷72÷58+62=
(615) 5-76×71÷33=
(616) 169÷13+193×38=
(617)
118×93-89+16=
(618) 97+86×17+72=
(619)
154×94×85-4=
(620) 60×39+155+99=
(621)
94-99-172÷72=
(622) 170×73+173+90=
(623)
89-25÷181-66=
(624) 180+77÷30÷72=
(625)
109÷13+114+29=
(626) 137-49-131+57=
(627) 191×46-191×24=
(628) 33×18+173×69=
(629) 93-86×99-63=
(630) 53×77÷198÷64=
(631) 141-86-46+30=
(632) 26×2-41×58=
(633) 79×24-7×4=
(634) 75+75÷181÷51=
(635) 120+23+177×87=
(636) 66÷18÷190÷54=
(637) 197-78×19+29=
(638) 59÷8-185+10=
(639) 10÷84÷115+49=
(640) 159+9-76×22=
(641) 79÷53÷16+65=
(642)
162-91÷16-78=
(643) 192÷48-92×18=
(644)
10×63-55-78=
(645) 55×2+181×92=
(646)
39+91×182-50=
(647) 146+43÷39÷48=
(648)
27-24×183×87=
(649) 158×26×193÷39=
(650)
47×23-88÷65=
(651) 55+48-187÷42=
(652)
115÷80÷18-67=
(653) 119+79÷35÷81=
(654)
42-51+40×13=
(655) 199-89×68×53=
(656)
81×73÷15+81=
(657) 167×66÷187+49=
(658)
181÷93×45×35=
(659) 161×47+112×84=
(660)
31-93÷130×46=
(661) 36-39+31-20=
(662)
119÷15+9×21=
(663) 20÷47-51-88=
(664)
172×81÷19×27=
(665) 156÷99+48÷21=
(666) 13×30÷139÷13=
(667)
159+69÷117+69=
(668) 8×28-40+39=
(669)
59-3×20+32=
(670) 119÷5×140+1=
(671)
58×42-40-79=
(672) 148+73+48÷50=
(673)
175×51-27×79=
(674) 193÷55×18+25=
(675)
99÷42+51÷22=
(676) 96×8×199-73=
(677)
36×97+51-43=
(678) 92-47÷81-76=
(679)
163-98÷82-51=
(680) 60+73÷149-75=
(681)
73+45÷172÷50=
(682) 172÷95×133-95=
(683)
31÷88÷165×68=
(684) 145+59+56+71=
(685)
18-48+173-78=
(686) 89+67×83+72=
(687)
185÷41+30+28=
(688) 158÷7+174×28=
(689)
101÷8÷135-57=
(690) 200-76-135÷49=
(691) 5-34×109+32=
(692)
5÷7÷61×59=
(693) 55×78÷39×63=
(694)
160+89×196+16=
(695) 174×95-132÷35=
(696) 92×99×173-33=
(697) 109×63×165×26=
(698) 125÷22-72+12=
(699) 72×5×132+39=
(700) 126-75+65÷62=
回答人的补充 2009-07-22
11:06
答案:
一、填空。
(1)在□内填入一个相同的一位数,使等式成立。
1×1=1÷1
5×9=9+36
9×9=72+9
7×7=56-7
4520÷39=115……35
2664÷72+936÷26=73
(2) 在下面的○中填上>、<或=。
25×4÷25×4>25×4-25×4
600÷20÷5=600÷(20×5)
450÷18-12<450÷(18-12)
3840-(103+17)×25<3840-103+17×25
412+750÷5×36<(412+750÷5)×36
750÷5+410×36>(750+410)÷5×36
35×(329-129)=35×329-129×35
二、判断下面各题的对错,对的在括号内打√,错的打×,并改正。
(1)54÷18+41×3
=3+41×3
=44×3
=132 ( × )
(2)16×5-80÷16
=80-80÷16
=0÷16
=0 ( × )
(3)640+360÷60+40
=1000÷100
=10 ( × )
(4)5×(825-115÷23)
=5×(825-5)
=5×820
=4100( √ )
(5)21×(376-376÷8)=0 ( × )
(6)(143+429÷13)×24=1056 ( ×
)
(7)396+126÷18-19=10 ( × )
(8)240-240÷15×4=236 ( × )
(9)(7225-104×15)÷55=103 ( √
)
三、计算。
78×50-1440÷12 = 3780
3856÷16+85×16 = 1601
4000÷(16+832÷13)= 50
(326+95×25)÷37= 73
(7236÷18-228)×28=4872
(4275-24×75)÷25=99
四、在下列式子中填上运算符号与小括号,使得数都是1。
(1)(1+ 2)÷3 = 1
(2)1×2+3-4 =1
(3)1×2-(3×4-5-6) =1
(4)1×2×3×4-(5×6-7)=1