Question

简便计算：4.8*9.25*7.6

Answer 1

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