问题 解答题
用简便方法进行计算
17.17-6.8-3.2-6.17
2.8×3.5+3.5×18.2-3.55.4×101.
答案

(1)17.17-6.8-3.2-6.17,

=(17.17-6.17)-(6.8+3.2),

=11-10,

=1;

(2)2.8×3.5+3.5×18.2-3.5,

=3.5×(2.8+18.2-1),

=3.5×20,

=70;

(3)5.4×101,

=5.4×(100+1),

=5.4×100+5.4×1,

=540+5.4,

=545.4.

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