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1800/25x4/12怎么脱式计算.

解答:在线数学帮助你! 根据题目:25X11X4;因为都是乘的(同目运算) 可以利用乘法交换律: =25X4X11 =100X11 =1100; 但愿对你有帮助!!祝你学习愉快!!!

800÷25 =(800x4)÷(25x4) =3200÷100 =32

=25×4×46 =100×46 =4600

250*30

75x4x25x4 =(75x4)x(25x4) =300x100 =30000

(640一351)÷(12x4)=289÷48 =289/48.

(25十70)x4 =25x4十70x4 =100+280 =380

=128×(25×4) =128×100 =12800

0.125×4×8×0.25 =(0.125×8)×(4×0.25) =1×1 =1

125x4 =125*2*2 =250*2 =500

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