问题 解答题
用你喜欢的方法计算.
7×12.5×0.84.7×3.6+4.7×6.41.45×[(2.8+4.4)÷2.4].
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.

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