问题
解答题
3.26×4.25+5.75×3.26
4.65÷(4.65×2.5)
18.1-2.78-7.22
4.5×9.9.
答案
(1)3.26×4.25+5.75×3.26,
=3.26×(4.25+5.75),
=3.26×10,
=32.6;
(2)4.65÷(4.65×2.5),
=4.65÷4.65÷2.5,
=1÷2.5,
=0.4;
(3)18.1-2.78-7.22,
=18.1-(2.78+7.22),
=18.1-10,
=8.1;
(4)4.5×9.9,
=4.5×(10-0.1),
=4.5×10-4.5×0.1,
=45-0.45,
=44.55.