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
问题描述：
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
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...