题目内容
6.怎样简便就怎样计算36.1×99+36.1;
3.6×201;
(45.9-32.7)÷8÷0.125;
4×0.8×12.5×2.5;
3.7×93.4+6.3×93.4.
分析 (1)(2)(5)根据乘法分配律计算即可求解;
(3)根据除法的性质计算即可;
(4)根据乘法交换律和结合律计算即可求解.
解答 解:(1)36.1×99+36.1
=36.1×(99+1)
=36.1×100
=3610;
(2)3.6×201
=3.6×(200+1)
=3.6×200+3.6
=720+3.6
=723.6;
(3)(45.9-32.7)÷8÷0.125
=13.2÷(8×0.125)
=13.2÷1
=13.2;
(4)4×0.8×12.5×2.5
=(4×2.5)×(0.8×12.5)
=10×10
=100;
(5)3.7×93.4+6.3×93.4
=(3.7+6.3)×93.4
=10×93.4
=934.
点评 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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