问题
解答题
计算,能简算的要写出过程
375+450÷18×25
45×101
4.05-2.8-0.7.
答案
(1)375+450÷18×25,
=375+25×25,
=375+625,
=1000;
(2)45×101,
=45×(100+1),
=45×100+45×1,
=4500+45,
=4545;
(3)4.05-2.8-0.7,
=4.05-(2.8+0.7),
=4.05-3.5,
=0.55.