问题 解答题

用自己喜欢的方式计算

①2.5×3.8×4

1.23×7.2+1.23×2.8

137÷4÷2.5

0.72+4.8÷0.16.

答案

(1)2.5×3.8×4,

=(2.5×4)×3.8,

=10×3.8,

=38;

(2)1.23×7.2+1.23×2.8,

=1.23×(7.2+2.8),

=1.23×10,

=12.3;

(3)137÷4÷2.5,

=137÷(4×2.5),

=137÷10,

=13.7;

(4)0.72+4.8÷0.16,

=0.72+30,

=30.72.

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