小学四年级数学简便计算题及答案(暑假练习).doc
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四年级数学简便计算题及答案
1)125 ×(17 × 8)× 4
2)375 × 480 + 6250 × 48
3)25 × 16 ×125
4)13 × 99
5)75000 ÷ 125 ÷ 15
6
7)150 × 40 ÷ 50
8
9)210 ÷ 42 × 6
10
11)67 × 21 +18 × 21 + 85 × 79
12
)7900 ÷ 4 ÷ 25
)5600 ÷(25
× 7)
)39600 ÷ 25
)321
× 81 + 321 × 19
13)222222 × 999999
14)333333 × 333333
15)56000
÷ (14000 ÷ 16) 16)654321 × 909090
+654321 × 90909
17)34 × 3535
-35 × 3434 18
19)345345 ÷ 15015
20
21)75 × 45 + 17 × 25
22
89
23)(48 × 75 ×81)÷(24 × 25 × 27)
)27000 ÷ 125
)347 + 358 + 352 + 349
)599996 + 49997 + 3998 + 407 +
四年级数学简便计算题及答案:
1)125
×(17 × 8)× 4 2)375
× 480 + 6250 × 48
=
125×8×4×17
=480
=1000×68
=480000
=68000
3)25 × 16 ×125
4
=25×2×8×125
=13
=50000
=1300
=1287
5)75000 ÷ 125 ÷ 15
6
=75×1000÷125÷15
=7900÷(4×25)
=75÷15×1000÷125
=79
=5×8
=40
7)150 × 40 ÷ 50
8
=150÷50×40
=56×100÷25÷7
=3×40
=120
=32
9)210 ÷ 42 × 6
10
×(375+625)
)13 × 99
×(100-1)
-13
)7900 ÷ 4 ÷ 25
)5600 ÷(25 × 7)
=56÷7×100÷25
)39600 ÷ 25
=210÷7÷6×6
=396×100÷25
=30
=396×4
=1584
11)67 × 21 +18 × 21 + 85 × 79
12)321 × 81 + 321 × 19
=21×(67+18)+85×79
=321×(81+19)
=21×85+85×79
=32100
=85×(21+79)
=8500
13)222222 × 999999
14
=222222×(1000000-1)
=111111
=222222000000-222222
=111111
=222221777778
=0
=9
15)56000 ÷ (14000 ÷ 16)
16
=56000÷14000×16
=654321×999999
=4×16
=654321
=64
=654321000000
=654320345679
)333333
× 333333
×999999
×(1000000-1)
-111111
)654321 × 909090 +654321×90909
×(100000-1)
-654321
17)34
× 3535 -35 × 3434
18)27000 ÷ 125
=34×35×101-35×34×101
=27×1000÷125
=0
=27×8
=216
19)345345 ÷ 15015
20)347 + 358 + 352 + 349
=345×1001÷(15×1001)
=350
=345÷15×1001÷1001
=23
=1406
21)75 × 45 + 17 × 25
22) 599996 + 49997 + 3998 + 407 + 89
=25×3×45+17×25
=600000+50000+4000
=25×(135+17)
=65400+487
=25×152
=65887
=25×4×38
=3800
23)(48 × 75
×81)÷(24 × 25 × 27)
=48÷24×75÷25×81÷27
=2×3×3
=18
×4-3+8+2-1
=1400+6
-4-3-2+407+89