问题 解答题
用简便方法计算.
15×24×2525×5×4×40800÷5÷4560÷(5×7)
答案

15×24×25,

=24×25×15,

=600×15,

=9000;

25×5×4×40,

=(25×4)×(40×5),

=100×200,

=20000;

800÷5÷4,

=800÷(5×4),

=800÷20,

=40;

560÷(5×7),

=560÷7÷5,

=80÷5,

=16.

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