问题
解答题
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答案
(1)37×20.2,
=37×(20+0.2),
=37×20+37×0.2,
=740+7.4,
=747.4;
(2)1.25×3.2×2.5,
=1.25×8×0.4×2.5,
=(1.25×8)×(0.4×2.5),
=10×1,
=10;
(3)20÷0.4÷2.5,
=20÷(0.4×2.5),
=20÷1,
=20.
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(1)37×20.2,
=37×(20+0.2),
=37×20+37×0.2,
=740+7.4,
=747.4;
(2)1.25×3.2×2.5,
=1.25×8×0.4×2.5,
=(1.25×8)×(0.4×2.5),
=10×1,
=10;
(3)20÷0.4÷2.5,
=20÷(0.4×2.5),
=20÷1,
=20.