三年级数学下册口算练习题52842
二年级作文春天来了-高二周记
三年级数学下册口算练习题
1)
33
件
5)
120X4=
9)
3X220=
13)
21X2=
17)
200X4=
21)
23X2=
25)
2
X
13=
29)
389+101=
33)
554-231=
37)
8
X
200=
41)
391+242=
45)
456-120=
49)
391+242=
53)
57)
68^2=
3
X
210=
2) 920X2= 3) 120X4= 4)
68
吃=
6) 41
X
3= 7) 510
X
2= 8)
3
X
220=
10) 88^4= 11) 80
吃=
12)
23>2=
14) 72
为=
15) 48^8= 16) 90^9=
18) 6
X
1
仁
19) 88
吒=
20)
120X4=
22) 483-17= 23) 310
X
3= 24)
80^4=
26) 389+101= 27) 3
X
220= 28)
9999
X
1=
30) 700X7= 31) 88£= 32) 99^9=
34) 80^2= 35) 0
X
144= 36) 700X7=
38) 890+210= 39) 987-123= 40)
6
X
11=
42) 1000-800= 43) 12
X
4= 44)
6
X
11=
46) 458-452= 47) 31
X
4=
48) 78-63=
50) 21-11= 51) 68
吃=
52)
44^4=
54) 96
七=
55) 93+120= 56)
120
X
4=
58) 120
X
4= 59)
14+25= 60) 41
X
3=
1
三年级数学下册口算练习题
61) 457+17=
65) 32X2=
69) 210+489=
73) 971-242=
77) 88^4=
81) 31
X
4=
85) 458-452=
89)
456-120=
93) 489-281=
97) 789+35=
10
X
2=
20
-
2=
40
X
9=
12
X
4=
75
-
5=
62) 44^4= 63) 88^4= 64) 456-120=
66) 2
X
13= 67) 473
—
221= 68)
32
X
2=
70) 21
X
2= 71)
23
X
2=
72) 33
七=
74) 458-452=
75) 99^9= 76) 21-11=
78) 84
吃=
79)
44
X
2= 80) 130
X
3=
82) 29-18=
83) 33
七=
84) 33
七=
86)
44
X
2= 87) 3
X
210= 88)
0
X
144=
90) 8
X
200=
91)
971-242= 92) 890+210=
95)
94) 33^3=
890+210
96) 430
X
1=
=
98)
29
吃
99)
9=
389+101= 100) 88^4=
=
72
－
47=
20
X
5=
27
＋
15=
63
-
3=
27
X
5= 510
-
3=
23
X
30= 84
-
4= 15
-
3=
513
X
9=
4
X
815= 99
-
9=
205
-
5=
46
X
10= 24
X
20=
2
三年级数学下册口算练习题
872
—
124=
591
-
3=
800
-
8=
0
-
245=
3000
—
300=
702
—
199=
62
X
15=
520
—
430=
91
X
31 =
400
X
20=
300
X
30=
86
X
7=
480
-
8=
270
-
30=
130
X
4=
6
丄
13 13
1 2
3 3
27
+
127=
8
X
122=
265
+
85=
0
X
245=
605
-
5=
480
-
3=
860
-
4=
51
X
17=
80
-
10=
210
-
7=
88
+
112=
27
X
90=
22
X
22=
92
X
7=
810
-
3=
6 4
7 7
2 4
9 9
3
700
-
5=
178
-
2=
110
X
35=
0
+
245=
50
X
50=
120
X
80=
19
X
5=
15
X
61 =
465
-
5=
4500
-
9=
380
-
7=
33
-
3=
16
X
50=
38
X
60=
72
—
24=
6 1
5 5
8 4
11 11
350
+
70=
30
X
80=
901
-
3=
245
-
5=
306
-
3=
27
X
8=
40
X
20=
87
-
3=
870
-
8=
5
X
80=
36
X
8=
880
-
8=
19
X
39=
14
X
4=
16
X
4=
7 3
10 10
6 4
17 17
三年级数学下册口算练习题
8
X
7
+
6=
50
-
24
-
4=
72
-
72
-
6=
12
X
3
-
3=
8
X
2
X
7=
45
+
55^5
=
51
-
4X6^3
=
6
X
7
+
6=
9
+
9
-
9=
8
+
2
X
10=
5
X
8
-
8=
24
+
15
+
6=
70
X
(40
-
32)
=
36
-
3
-
2=
800- 800
-
4=
90
-
30
-
3=
57
X
3
X
0=
18
-
3
-
4=
300
-
2
-
5=
5
X
5
+
4=
8
X
9
-
7=
6
X
80
-
20=
86
-
86
-
2=
50
X
6
+
0=
960
-
4
-
2=
3000
-
6
X
408=
500- 412
泊
=
(400
-
394)
X
706=
1+2+3+4+5+6+7+8+9+10=
1+12+123+1234+12345=
15
+
3
+
7
=
439
+
46=
200
+
5000
=
280+70=
5+0.5=
2.66+3.58=
12+12
-
12=
60+89=
215+4=
1+11+111+1111+1111=
10000
-
1000
-
100
-
10
-
1=
3.8+6.6=
632
+
131=
102
+
20
=
0
+
8
=
480
+
90
=
7
+
3
X
0
=
45
+
55
-
5
=
4
+
0.6=
6.5+4.7=
4.6+2.4=
40
+
580
=
75
+
25
-
5
=
320
-
180
=
17+18=
62-17=
600+300
=
6000
+
3096
=
7681
+
2309
=
4
8501+53799=
86509+4736=
5268+29=
86509-4736=
1.5-0.7=
450
－
175=
45
-
9
-
17
=
7894
－
66=
6789
-
789
=
8020
-
8000
=
125
-
25
X
2
=
1.2
—
0.3=
7.3
-
2.9=
10
-
0.7=
8.2
—
5=
91
-
59
=
750
-
78
=
51
-
4
X
6
=
600
-
50
=
1.3
-
0.5=
54
-
9=
7.1
-
2.4=
2.3
-
1.6=
56.4
-
2.8=
26
-
8=
350-70
=
80-36=
500-240=
11.36-6.95=
540
-
360=
359
-
42=
1000
-
60=
250
-
25=
3
X
10
=
80
X
40
=
63
X
36
=
26
X
38
=
25
X
17=
360
X
5
=
32
X
68
=
56
X
79
=
64
X
28
=
5
80
X
30=
60
X
70=
18
X
5
=
40
X
60
=
54
X
63
=
25
X
38
=
36
X
19
=
16
X
60
=
500
X
3
=
0
X
930
=
27
X
30
=
12
X
40
=
10
X
40
=
12
X
50
=
15
X
6
=
32
X
30
=
5
X
20
=
160
X
4
=
13
X
4
=
25
X
4
=
50
X
0
X
8
=
70
-
5
=
30
-
10
=
84
-
42
=
300
—
5
=
720
-
9
=
720
—
0
=
180
—
20
=
0
—
90
=
85
—
5
=
57
—
3
=
630
—
9
=
450
—
5
=
240
—
6
=
84
—
12
=
420
—
3
=
910
—
3
=
1000
—
5
=
75
—
15
=
560
—
4=
95
—
1
=
510
—
7
=
200
—
4
=
72
—
4
=
8000
—
2
=
4000
—
50
=
90
—
5
X
3
=
10
—
10
X
30
=
420
—
2
=
300
—
2
—
5
=
774
—
8
=
1.1
＋
0.9=
0.9+0.8=
25
＋
40=
103
＋
329=
428+471=
1345+1490=
238+136=
3562+4884=
190
＋
360=
140
＋
60=
14+325=
53
＋
64=
6
63+22=
34
＋
200=
25
＋
300=
3600
—
300=
8400
＋
600=
1900+5400=
2300
—
800=
27
＋
5=
25
＋
24=
360
＋
85=
296
＋
304=
28300
＋
41=
65100
＋
210=
648
＋
350=
8450
＋
32=
407
＋
3=
30
+
50
X
0=
290
＋
30=
30
－
17=
111
－
15=
201
－
70=
77
－
9=
45
－
27=
16
－
9=
260
－
68=
136
－
70=
45
－
5=
450
—
5
-
9=
370
－
190=
60
—
12=
85
—
50=
66
—
6=
1000
—
20=
640
—
40=
312
—
57=
24
—
8=
78
—
7=
828
—
18=
437
—
163=
820
—
560=
34
—
20=
254
—
37=
3600
—
300=
8400
—
600=
1900
—
540=
2300
—
800=
274
—
45=
355
—
29=
476
X8 =
1040
X5 =
1609
X
5=
13X52
二
17
X
36=
79
X
22
〜
45
X
29
~
700
X
4=1
35
X
4=
300
X
5=
35
X
20=
21
X
30=
10
X
18=
80
X
0=
40
X
70=
7
30
X
20=
50
X
60=
21
X
5=
45
X
20=
60
X
70=
50
X
12=
36
X
42=
65
X
25=
27
X
34=
25
X
14=
65
X
11
〜
76
X
11
〜
27
X
19
〜
45
X
19
~
53
X
21
〜
7248
-
4=
96
-
6=
3560-12=
24375
-
5=
840
-
4=
5600
-
7=
480
-
6=
380
X
O
X
25=
240
-
6=
18
X
3=
300+4166=
306
X
5=
576
+
8=
814
-
4=
920
-
4=
90
-
6=
48
-
16=
96
-
24=
900
-
45=
6240
-
20=
4608
-
53=
380+60=
210
-
7=
24
X
5=
230
X
3=
5
X
10=
35
-
5
X
4=
32-32
+
8=
45
-(
16-7
)
=
508
-
2
=
114
＋
19=
2050
＋
57
380
＋
24=
2835
＋
27=
700
＋
28=
120
＋
8=
18
＋
5=
370
-
5
=
19
X
47
=
16
X
6
=
900
-
5
=
23
X
34
=
392
-
4
=
203
-
9
=
770
-
5
=
696
-
2
=
882
-
4
=
809
-
8
=
8
820
-
3
=
11
X
70=
30
X
40=
630
-
6
=
458
-
4=
238
-
6
〜
876
-
3
〜
417
-
6
〜
753
-
5
〜
89
X
30
〜
32
X
48
〜
70
X
32
=
43
X
22
〜
52
X
68
〜
890
—
9
~
6
X
98
=
459
—
50
~
67
X
42=
4693
-
7=
8608
-
8=
15
X
4=
96
-
8=
140
X
7=
8024
+
4=
72
-
12=
9
X
4+6=
3200
-
40=
4800
-
60=
150
X
20=
38
X
47=
603
X
12=
1607
-
15=
8380
-
27=
45
-
5
X
6
=
3
X
6
-
9
=
6
-
3
X
8
=
36
-
4
X
5
=
3
X
3
X
3
=
7
X
6
-
3
=
4
X
6
-
8
=
125
X
4=
417
-
60
〜
351
+
5
〜
627
+
9
〜
400+80=
4000
+
8=
84
X
21
〜
38
X
21
〜
35
X
21
〜
720
+
8=
60
X
30=
690
+
3=
38
X
85=
816
+
4=
348
+
5=
800
+
4=
309
+
3
X
0=
29
X
81
〜
83
+
9
~
40
X
60=
50
X
(3
X
4)=
564
+
7=
6668
+
4=
9
30
X
8=
1600-12=
12
X
58=
22
X
38=
36
X
20=
480
+
6=
0
+
8=
200
+
5=
630
+
7=
30
X
17=
11
X
15=
20
X
70=
7
X
7-9=
45-2
X
7=
0
+
16
X
9=
260
＋
680=
13
X
6-70=
4
X
5
X
5=
450
+
5
+
9=
370-190=
60
+
12=
三年级数学下册口算练习题
8
X
50=
6+6
x
6=
1000
-
20=
640
-
40=
312
x
57=
24
x
8=
1.
40-2=
70+50=
9
X
799
〜
2.
45
X
28
〜
2100
-
3=
24
-
8=
3.
3X800
=
58
+
33
=
1200
—
200
=
4. 45+45=
90+30=
50+80=
5.
21
X
30
=
22
X
40
=
0^93
=
78
X
7=
828
-
18=
437+163=
820-560=
34
X
200=
25
X
300=
70+90= 70+2=
421
-
7
〜
52+35=
9
X
799= 80
-
4=
160-60=
160
-
8=
50
X
80= 28
-
7=
12
X
20=
35
-
5=
420 -7
=
3
X
220
=
420
—
20
=
93
-
3
=
11
X
7
=
80
—
46
=
50
X
90=
42
X
98
〜
90+40= 170-90=
110-80= 50+90=
660
北=
65
X
10
=
80X80
=
10
X
47
=
600
-
3
=
10
X
36
=
10
3600
-
300=
8400
-
600=
1900+5400=
2300-800=
27
X
4
X
5=
35
X
5
X
2=
140-7=
720
-
8=
26+9=
150+40=
500
X
4=
50
-
5
=
480
-
4
=
880
-
4
=
82
-
9
〜
5
X
5+52
110-30=
400+300=
540
-
6
=
30
X
70
=
660
-
3
=
三年级数学下册口算练习题
6.
43
+
38
=
10
X
73
=
720
乜=
90
X
50
=
36
＋
56
=
800
*
8
=
23
X
30
=
6000
＋
2000
=
120
X
4
=
7. 63
*
9=
300
X
6=
90-65=
8.
40
X
70
=
125
*
2
〜
71-68=
9. 3
X
200
=
880
*
4
=
3
X
31
=
10. 360
*
9
=
2
X
440
=
280
*
4
=
11. 11
X
40
=
8000
－
1000
=
10
X
73
=
640
* 2=
280
*
4=
25+41=
52
X
44
~
131
*
6
〜
4
X
9
*
6=
600
*
1=
620
*
2
=
7500
－
500
=
58
＋
26
=
44
X
2
=
460
*
2
=
9
X
400
=
900
X
5
=
20
X
24
=
10
X
58
=
52
X
94
〜
50
X
50=
140
*
7=
74
X
54
~
900
*
3
=
90
*
9=
1500
*
3=
660
*
2
=
0
*
91
=
120
X
4
=
960
*
3
=
70
＋
500
=
3
X
330
=
67
－
49
=
57
＋
29
=
0
*
49
=
250
*
5=
810
*
9=
20
X
31=
41
X
75
〜
57
＋
29
=
1600
*
2=
9
X
300=
640
*
8
=
12
X
4
=
0
X
97
=
32
X
2
=
3
X
33
=
690
*
3
=
200
*
4
=
540
*
6
=
34
X
20
=
11
三年级数学下册口算练习题
12. 80
冷
0
=
720
弋=
700X5
=
30
X
70
=
10
X
34
=
41
X
20
=
120
X
4
=
65
X
10
=
7000
－
3990
〜
640
-
8
=
660
-
3
=
30
X
30
=
13. 10
X
7
=
11X40=
80X80=
14. 36
＋
56
=
400
＋
600=
720
弋=
15. 500
＋
40=
320
詔=
640
吃=
16.
210
-
7=
180
-
3=
8
十
1
X
8=
30
X
23
=
70
X
40
=
29
＋
14
=
88
X
10
=
34
＋
29
=
33
X
30
=
22
X
40
=
83
-
9
〜
30
X
50
=
3
X
8=
80
X
99
〜
20+90=
660
为=
10
X
36
=
80
X
50
=
600
为=
800
乜=
32
X
20
=
440
-
4
=
77
－
29
=
75
＋
18
=
80
-
2=
280
-
4=
80+20=
12
5900
－
5000
=
6000
＋
2000
=
200
X
4
=
22
X
30
=
21
X
30
=
87
X
10
=
33
X
20
=
0
-
93
=
600
＋
700
=
40
X
10=
90
X
100=
130-2=
三年级数学下册口算练习题
17. 310 >3
=
82
—
55
=
600
七=
18. 7
>
50
=
80
＋
17
=
90
七=
19. 800
4 =
360 W
=
1200
—
715
=
20. 53
—
14
=
140
4
2
=
840
4
2
=
21. 13
>
3
=
50
>
6
=
960
4
3
=
390
4
3
=
310
>
3
=
48
＋
28
=
880
4
8
=
54
＋
28
=
180
4
3
=
60
—
15
=
37
＋
56
=
299
4
3
〜
17
＋
27
=
660
4
6
=
430
>
2
=
34
＋
56
=
159
4
4
〜
1500
—
903
=
230
>
3
=
720
4
9
=
641
4
8
〜
879
十
8
42
>
3
=
300
4
5
=
900
4
3
=
32
>
3
=
50
>
7
=
840
4
4
=
7
>
800
=
540
4
9
=
96
4
3
=
620
4
2
=
1807
—
800
=
11
>
4
=
4700
—
700
=
480
4
8
=
9
>
500
=
1700
—
800
=
930
4
3
=
450
4
9
=
70
>
7
=
0
>
37
=
2
>
14
=
7
>
700
=
31
>
3
=
2
>
330
=
6
>
800
=
63
4
3
=
13
三年级数学下册口算练习题
22. 26
+
57
=
37
+
8
=
500
+
500
=
23. 0
4
7
=
24
X
2
=
7X80
=
24. 89
4=
24
X
2-3
=
7
X
81
=
25. 23
X
30
=
40
X
50
=
24
X
2
=
26. 70
X
11
=
30
X
21
=
1
X
36
=
800
4
8
=
480
4
8
=
33
X
2
=
560
4
7
=
0
4
54
=
48
X
10
=
562 4
〜
0
4
54
=
53
X
10
=
60
X
50
=
30
X
21
=
3
0
X
70
=
30
X
40
=
20
X
70
=
10
X
19
=
33
＋
57
=
630
4
3
=
800
4
2
=
440
4
4
=
23
X
3
=
40
X
40
=
241^2
〜
(23-3)
X
3
=
60
X
70
=
70
X
80
=
7
X
11
=
10
X
74
=
24
X
20
=
28
X
1
=
11
X
50
=
600
X
3
=
62
－
33
=
700
4
8
=
93
4
3
=
12
X
30
=
40
X
10
=
30
4
(3-1)
=
13
X
30
=
X
68
=
50
X
70
=
50
X
10
=
12
X
20
=
20
X
13
=
30
X
30
=
10
14
三年级数学下册口算练习题
27. 28
X
0
=
21 MO
=
6X90
=
28. 31
X
O
=
21
X
2
=
22X4
=
29. 12
X
O
=
200
X
3
=
3
X
700
=
30. 24
X
20
=
800
X
7
=
13
X
30
=
31. 60
X
40
=
40
X
90
=
48
＋
19
=
32. 20
＋
35
=
84
X
1
=
31
X
20
=
20
X
50
=
12
X
10
=
20
X
33
=
22
X
3
=
44
X
20
=
30
X
80
=
220
X
3
=
41
X
20
=
33
X
30
=
50
X
30
=
723
乜〜
23
X
30
=
90
X
30
=
2
X
31
=
70
X
6
=
45
＋
35
=
900
X
6
=
702
X
6
=
10
X
36
=
31
X
2
=
90
X
20
=
60
X
90
=
12
X
4
=
33
X
10
=
22
X
40
=
21
X
30
=
20
X
41
=
0
X
45
=
10
X
89
=
4
X
90
=
21
X
40
=
33
X
20
=
4
X
900
=
32
X
20
=
34
X
20
=
84
X
10
=
30
X
33
=
14
X
20
=
20
X
13
=
39
X
10
=
22
X
30
=
50
X
90
=
90
X
40
=
10
X
46
=
6
X
600
=
50
X
70
=
69
X
10
=
60
X
60
=
30
X
20
=
40
X
70
=
2
X
310
=
70
X
60
=
33
X
30
=
9
X
800
=
15
三年级数学下册口算练习题
33. 70
%
0
=
22
X
30
=
400
+
300
=
34. 80
X
0
=
22
X
40
=
46
+
37
=
35. 360
§
=
490 T
=
65
X
0
=
36.
21
X
0
=
2000
+
300
=
0
X
36
=
37. 400
+
300
=
12
X
20
=
700 T
=
2
X
42
=
6X500
=
5
X
900
=
201
X
4
=
44
+
20
=
420^6
=
10
X
34
=
20
X
34
=
330
§
3
=
80
X
40
=
880
§
2
=
50
X
30
=
34
＋
39
=
30
X
80
=
33
X
30
=
86
－
47
=
8
X
70
=
10
X
33
=
0
§
20
=
41
X
39
〜
300
§
6
=
40
X
90
=
300
X
3
=
250
§
5
=
10
X
37
=
70
X
20
=
640
§
8
=
360
§
6
=
41
X
20
=
0
§
59
=
5
X
90
=
42
X
20
=
22
X
0
=
6
X
60
=
43
X
20
=
40
X
11
=
90
X
60
=
80
X
4
=
680
－
80
=
20
X
50
=
400
§
4
=
880
§
4
=
99
X
10
=
97
X
10
=
11
X
80
=
16
三年级数学下册口算练习题
38. 200
4 =
44
—
37
=
71
—
23
=
39. 43
鬼
=
90
X
30
=
42
X
20
=
40. 52
—
29
=
480
4
3
=
60X50
=
41.20
X
3
=
10
X
35
=
50X90
=
42. 420
4 =
22
X
40
=
630
4
9
=
31
X
20
=
40
X
12
=
0
4
43
=
0
X
20
=
30
X
12
=
100^5
=
240
X
2
=
33
X
30
=
410
X
2
=
440
4
4
=
29
＋
61
=
80
X
30
=
300
4
6
=
33
X
20
=
30
X
23
=
600
＋
90
=
84
—
47
=
31
X
30
=
75
＋
18
=
46
＋
24
=
10
X
50
=
52
＋
39
=
50
X
5
=
41
X
20
=
30
X
32
=
410
4
7
〜
20
X
14
=
240
4
4
=
900
4
9
=
330
X
3
=
4700
—
700
630
4
7
=
21
X
30
=
23
＋
48
=
0
4
73
=
350
4
5
=
400
4
8
=
800
X
3
=
310
X
3
=
0
X
35
=
30
X
30
=
90
X
50
=
69
X
10
=
810
4
9
=
0
X
30
=
17
三年级数学下册口算练习题
43. 750
—
50
=
300^5
=
70
X
11
=
44. 49
+
33
=
11
X
4
=
90+20=
45.
40
X
70
=
43
—
16
=
88
X
10
=
46. 440 M
=
90
弋=
480
吃=
47. 420^2
=
690
七=
480
吃=
480-8
=
300
+
700
=
4500
—
500
=
707
-
7
=
230
X
3
=
17-8=
43
＋
38
=
10
X
80
=
700
X
5
=
32
X
3
=
13
X
3
=
39
-
3
=
63
-
3
=
58
—
0
=
60
X
5
=
5010
+
2003
〜
420
-
2
=
20
X
40
=
23
X
3
=
46
—
9
~
180-80=
90
X
50
=
51
X
82
〜
81
X
99
〜
48
-
4
=
600
X
7
=
560
-
8
=
160
-
4
=
2
X
440
=
2
X
44
=
77
—
48
=
820
-
2
=
400
-
4
=
78
—
36
=
10-5=
350
-
5=
84
—
65
=
500
＋
40
=
40
X
70
=
540
-
9
=
120
X
3
=
990
-
3
=
800
＋
700
=
48
-
2
=
840
-
4
=
18
三年级数学下册口算练习题
48. 0^51
=
84
詔=
68
—
49
=
49. 42
X
42
0X85
=
930-3
=
80
X
7
=
66
X
54
〜
70
-
7
=
83
—
57
=
330
-
3
=
5
X
900
=
29
＋
68
=
3
X
23
=
131
-
6
66+26=
150-60=
700+600=
45
X
52
70+80=
110-6= 65
—
9
~
99
-
3
=
180
-
9
=
140
2=
〜
50. 57
—
38
=
770
-
7
=
65
＋
15
=
1500
—
=
700
660
-
3
=
42
X
2
=
960
-
3
=
800
X
2
=
660
-
6
=
-
32
＋
9
=
71
—
7
=
60
400
X
3
=
-
2
=
X
8
=
X
2
=
X
80
=
X
30
=
X
10
=
50
90
800
-
2
=
-
3
=
-
4
=
22
X
4
=
66
62
20
140
150
-
6
=
-
2
=
X
4
=
-
7
=
X
2
=
69
-
3
=
13
X
2
=
84
49
31
7
16
28
＋
17
=
30
64
—
36
=
31
15
X
4
=
9
36
-
3
=
15
X
40
=
30
X
20
=
8
150
-
4
=
X
10
=
56
X
10
=
42
5
X
60
=
70
X
3
=
20
X
30
=
4
X
60
=
X
40
=
27
X
70
=
X
30
=
10
X
10
=
6
X
30
=
70
—
3
=
X
4
=
60
X
40
=
X
40
=
50
X
30
=
35
X
20
=
64
-
4
=
19
三年级数学下册口算练习题
36
+
50
=
40
63
-
7
=
230
X
50
=
18
+
6
=
200
X
30
=
42
X
4
=
X
50
=
150
-
3
=
X
20
=
15
X
80
=
-
3
=
X
3
=
X
60
=
X
4
=
24
X
3
=
15
17
75
48
X
20
=
130
X
3
=
60
-
26
=
21
X
40
=
23
490
14
35
51
21
30
14
260
X
2
=
75
300
X
6
=
15
34
X
2
=
120
-
6
=
15
25
X
8
=
X
5
=
X
4
=
X
8
=
X
30
=
—
7
=
X
5
=
X
6
=
X
3
=
X
4
=
-
3
=
25
X
40
=
125
13
X
5
=
1200
308
X
7
=
105
X
30
=
90
X
6
=
1400
宁
4
=
5
X
17
=
X
5
=
12
28
12
X
8
=
92
X
3
=
6
X
20
=
-
2
=
X
13
=
150
X
4
=
650
84
18
3200
X
2
=
24
X
20
=
900
-
6
=
10
—
5
=
-
3
=
X
4
=
X
47
=
18
26
X
2
=
X
30
=
1900
X
5
=
720
宁
4
=
50
X
70
=
36
X
20
=
48
-
4
=
400
-
8
=
4
X
250
=
18
160
6
90
99
X
2
=
X
800
=
0
-
15
=
-
9=
480
11
-
2
=
50
X
60
=
X
3
=
-
3
=
X
8
=
130
X
5
=
+
16
=
X
2=
420 3
X
24
=
48
86
11
X
40
=
53+26=
-
2=
700
20
三年级数学下册口算练习题
6
X
11 =
83
29+49
—37= 90
(
=
400
72
12
3
— 34
2
X
23=
2 :
X120=
800+300=
二
60+17
500+300=
4000+300=
7300+400=
110
X
4=
25+18=
X
4 =
-
8=
X
3=
4
X
700=
15
X
4=
72
二
88
-
8=
200
X
8=
402
X
2=
4700
—700=
63
110
-
7=
-
7=
X
1
=
X
6=
X
3=
-
3=
X
310= 950
X
0=
3700+3000= 500
25+43=
6500— 300= 21
X
3=
500
X
4=
85—49=
350
X
4=
68+17=
1
6700+200=
7
6
84
X
600=
600
-
2=
3
90
-
3= 44
—34= 44+46=
71
—
300+800=
900
X
4=
50
—36=
65—39= 1100 — 500=
44=
220
X
4=
500
X
3=
120
3=
X
25+37=
50
X
60 =
6
X
6+7= 7
X
9+4= 6
X
9+8=
7
X
8+4= 9
X
4+6=
()
+70=130
50
X
(
)
=200
( )
—300=500
宁（）
=7
35
-
350+
()
=
1000 400
-
(
)
=200
(
)X
8=400 1000 —
()
=700
)
+500=1000
2000
-
()
=0
()宁
5 =30 300 —
()
= 100
(
()宁
6= 50 500+
*
(
)
=700
( )-
700=300 900 —
()
=100
21
22