问题 解答题
用简便方法计算.
28×25
132+(265+68)210÷35295-153-47.
答案

(1)28×25,

=4×7×25,

=(25×4)×7,

=100×7,

=700;

(2)132+(265+68),

=(132+68)+265,

=200+265,

=465;

(3)210÷35,

=210÷(7×5),

=(210÷7)÷5,

=30÷5

=6;

(4)295-153-47

=295-(153+47),

=295-200

=95.

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