简便算:4.3*1.65+2.35*4.3 (2)9.9*7.6+99*0.24 (3)1.25*5.6 (4)5.1*19.96-19.96+19.96*5.9
简便算:4.3*1.65+2.35*4.3 (2)9.9*7.6+99*0.24 (3)1.25*5.6 (4)5.1*19.96-19.96+19.96*5.9
数学人气:133 ℃时间:2020-01-19 22:26:56
优质解答
4.3*1.65+2.35*4.3=4.3x(1.65+2.35)=4.3x4=17.29.9*7.6+99*0.24 =9.9x7.6+9.9x2.4=9.9x(7.6+2.4)=9.9x10=991.25*5.6=1.25x8x0.7=1x0.7=0.75.1*19.96-19.96+19.96*5.9=19.96x(5.1-1+5.9)=19.96x10=199.6请点击...
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