简便计算:4.8*9.25*7.6
问题描述:
简便计算:4.8*9.25*7.6
答
337.44
答
(5-0.2)*(9+0.25)*(7.5+0.1)
=(45+1.25-1.8-0.05)*(7.5+0.1)
=(45-0.6)*(7.5+0.1)
=337.5+4.5-4.5-0.06
=337.44
答
4.8×9.25×7.6=﹙4+0.8﹚×﹙9+0.25﹚×7.6=﹙4×9+4×0.25+0.8×9+0.8×0.25﹚×7.6=﹙36+1+7.2+0.2﹚×7.6=44.4×7.6=﹙44+0.4﹚×﹙7+0.6﹚=44×7+44×0.6+0.4×7+0.4×0.6=308+26.4+2.8+0.24=337.44...