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400÷25 9000÷125÷8 72×125 64×11-64 4×8×25×125 15×12+25×12+40×8 36×25 简便
题目详情
400÷25 9000÷125÷8 72×125 64×11-64 4×8×25×125 15×12+25×12+40×8 36×25 简便
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答案和解析
400÷25
=400÷(100÷4)
=400÷100×4
=4×4
=16
9000÷125÷8
=9000÷(125×8)
=9000÷1000
=9
72×125
=9×8×125
=9×1000
=9000
64×11-64
=64×(11-1)
=64×10
=640
4×8×25×125
=4×25×8×125
=100×1000
=100000
15×12+25×12+40×8
=(15+25)×12+40×8
=40×12+40×8
=40×(12+8)
=40×20
=800
36×25
=9×4×25
=9×100
=900
=400÷(100÷4)
=400÷100×4
=4×4
=16
9000÷125÷8
=9000÷(125×8)
=9000÷1000
=9
72×125
=9×8×125
=9×1000
=9000
64×11-64
=64×(11-1)
=64×10
=640
4×8×25×125
=4×25×8×125
=100×1000
=100000
15×12+25×12+40×8
=(15+25)×12+40×8
=40×12+40×8
=40×(12+8)
=40×20
=800
36×25
=9×4×25
=9×100
=900
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