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3.25 4.78 4的简便方法

3.25X4.78X4=(3.25X4)X4.78=(3X4+0.25X4)X4.78=13X5-13X0.22=65-13X0.2-13X0.02=65-2.6-0.26=65-2.86=65-3+0.14=62.14

原式=(0.25*4)*4.78=1*4.78=4.78 希望对你有帮助,满意请及时采纳,你的采纳是我回答的动力!

化小数为分数:3.25*4/3=(3+1/4)*4/3=4+1/3=4又1/3.

原式=6.25x4x3=(6x4+0.25x4)x3=(24+1)x3=25x3=75供参考.

等于0.325

25*4=100 原式=33*100=3300 求采纳 谢谢

(8.25-3.75)÷2.5÷4=(8.25-3.75)÷(2.5x4)=(8.25-3.75)÷10=4.5÷10=0.45

解:原式= 25*4*33 = 100*33 = 3300

3.25 20/21 3/4.用简便计算.3.25 20/21 3/4.=3.25+0.75+20/21=4+20/21=4又20/21

(3.25-64.8/4)*0.5的简算方法是(3.25-64.8/4)*0.5=(3.25-(64+0.8)/4)*0.5=(3.25-64/4-0.8/4)*0.5=(3.25-16-0.2)*0.5=(3.05-16)*0.5=(3+0.05-16)*0.5=3*0.5+0.05*0.5-16*0.5=1.5+0.025-8=-6.475 望采纳,谢谢!

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