问题
解答题
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答案
(1)2.5×0.32×12.5
=(2.5×0.4)×(0.8×12.5)
=1×10
=10;
(2)0.4×0.2÷0.4×0.2
=0.4÷0.4×0.2×0.2
=0.04;
(3)2.7+1.56+7.3+13.44
=(2.7+7.3)+(1.56+13.44)
=10+15
=25;
(4)3.8×4.5+3.8
=3.8×(4.5+1)
=3.8×5.5
=20.9;
(5)301×99
=(300+1)×99
=300×99+99
=29700+99
=29799;
(6)14×[752-(152+28)]
=14×[752-180]
=14×572
=8008.