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23.4%0.8.4%7.2=多少,简便计算.急 急急急

=(23.4-13.4)-(0.8+7.2) =10-8 =2

=(23.4-13.4)-(0,.8+7.2) =10-8 =2

1、4.23x(1.08+0.92)(0.423增大十倍,9.2缩小十倍) 2、7.2x(4.9+0.1) (3.6和7.2是倍数,3.6增大两倍,相乘的9.2缩小两倍)

23.4-0.8-13.4-7.2 =(23.4-13.4)-(7.2+0.8) =10-8 =2

23.4-0.8-13.4-7.2 =23.4-13.4-(0.8+7.2) =10-8 =2 谢谢,请采纳

23.4-0.8-13.4 =23.4-13.4-0.8 =10-0.8 =9.2

23.04-(6.2+0.8)-6.2=23.04-7-6.2=23.04-(7+6.2)=23.04-13.2

23.04-0.8-13.4-6.2 =23,04一(0.8+13.4十6.2 ) =23.04一20.4 =2.96

计算7.25×0.32的简便算法 是7.25×0.8×4=23.2对吗? 7.25*0.32 =7.25*0.4*0.8 =2.9*0.8 =2.32 不对,0.32=0.4*0.8

先算0.8+7.2=8 然后23.4+8=31.4

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