问题
解答题
用你喜欢的方法计算.
|
答案
(1)7×12.5×0.8,
=7×(12.5×0.8),
=7×10,
=70;
(2)4.7×3.6+4.7×6.4,
=4.7×(3.6+6.4),
=4.7×10,
=47;
(3)1.45×[(2.8+4.4)÷2.4],
=1.45×[7.2÷2.4],
=1.45×3,
=4.35.
用你喜欢的方法计算.
|
(1)7×12.5×0.8,
=7×(12.5×0.8),
=7×10,
=70;
(2)4.7×3.6+4.7×6.4,
=4.7×(3.6+6.4),
=4.7×10,
=47;
(3)1.45×[(2.8+4.4)÷2.4],
=1.45×[7.2÷2.4],
=1.45×3,
=4.35.