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(9.4%5.8)÷0.4 3.6简便计算?

(9.4-5.8)÷0.4 +3.6=3.6/0.4+3.6=9+3.6=12.6 就按照原来的先后顺序做最简便.

9.6÷0.4÷3=9.6/(0.4*3)=96/12=8

=2*5÷0.4=10÷0.4=25

(5.8-3.9)÷0.4=1.9÷0.4=19/4(假分数)=4又3/4(带分数)=4.75(小数)

解:9.4*0.4-0.4*0.4等于( 18/5 ),【即等于3.6】 ∵已知需求出9.4*0.4-0.4*0.4等于多少 A * B - A * C = A * (B - C) ∴9.4 * 0.4 - 0.4 * 0.4 = 0.4 * (9.4 - 0.4) = 0.4 * 9 = 4/10 * 9 = 2/5 * 9 = 18/5 = 3.6 答:9.4*0.4-0.4*0.4等于18/5,【即等于3.6】

4.7x2.8+3.6x9.4-1.5=2.8x4.7+7.2x4.7-1.5=(2.8+7.2)x4.7-1.5=10x4.7-1.5=47-1.5=45.5

9.6÷0.8÷0.4=9.6÷(0.8*0.4)=9.6÷0.32=30

(1)7.06*2.4-5.7, =16.944-5.7, =11.244; (2)5.4*99+5.4, =5.4*(99+1), =5.4*100, =540; (3)9.6*72+9.6*28, =9.6*(72+28), =9.6*100, =960; (4)(1.25*2.5)*4, =1.25*(2.5*4), =1.25*10, =12.5; (5)10.4+72*0.81, =10.4+58.32, =68.72; (6)11*0.6*0.4, =6.6*0

5.8乘0.4 3.2乘0.4 0.4用简便计算5.8乘0.4 3.2乘0.4 0.4=0.4*(5.8+3.2+1)=0.4*10=4

9.4+0.4÷25*4=9.4+0.016*4=9.4+0.064=9.464

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