问题 解答题
算一算.
3.25×0.45+6.75×0.4531.5-24.5÷3.57.5×1026.3+3.7×2.8.
答案

①3.25×0.45+6.75×0.45,

=0.45×(3.25+6.75),

=0.45×10,

=4.5;

②31.5-24.5÷3.5,

=31.5-7,

=24.5;

③7.5×102,

=7.5×(100+2),

=7.5×100+7.5×2,

=750+15,

=765;

④6.3+3.7×2.8,

=6.3+10.36,

=16.66.

单项选择题 A3/A4型题
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