Question

10.5×0.8-1.5×0.8的简便方法计算谢谢

10.5×0.8-1.5×0.8的简便方法计算谢谢

Answer 1

用“提取公因数”的办法：
10.5×0.8-1.5×0.8
=（10.5-1.5）×0.8
=9×0.8
=7.2

Answer 2

10.5×0.8-1.5×0.8
=0.8x(10.5-1.5）
=0.8x9
=7.2

Answer 3

10.5×0.8-1.5×0.8
=0.8×（10.5-1.5）
=0.8×9
=7.2

Answer 4