小学四年级数学180道简便计算题及答案.pdf

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小学四年级数学180道简便计算题及答案

1)25×16×125

=25×2×8×125

=50000

=1287

2)13×99

=13×(100-1)

=1300-13

=1287

3)75000÷125÷15

=75×1000÷125÷15

=75÷15×1000÷125

=5×8

=40

4)7900÷4÷25

=7900÷(4×25)

=79

5)150×40÷50

=150÷50×40

=3×40

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=120

6)5600÷(25×7)

=56×100÷25÷7

=56÷7×100÷25

=32

7)39600÷25

=396×100÷25

=396×4

=1584

8)210÷42×6

=210÷7÷6×6

=30

9)27000÷125

=27×1000÷125

=27×8

=216

10)654321×909090+654321×90909

=654321×999999

=654321×(100000-1)

=654321000000-654321

11)599996+49997+3998+407+89

=600000+50000+4000-4-3-2+407+89

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=65400+487

=65887

12)(48×75×81)÷(24×25×27)

=48÷24×75÷25×81÷27

=2×3×3

=18

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