题目内容
6.下面各题,怎样简便就怎样算.4.3+0.98+0.7 | 4.05÷0.81+2.4 | 0.25×16.2×4 |
(3.24+2.6)×(1-0.75) | 13.6×0.5-3.6÷2 | 56.5×99+56.5 |
分析 (1)根据加法交换律进行简算;
(2)先算除法,再算加法;
(3)根据乘法交换律进行简算;
(4)先算加法和减法,再算乘法;
(5)根据乘法分配律进行计算即可;
(6)根据乘法分配律进行简算.
解答 解:(1)4.3+0.98+0.7
=4.3+0.7+0.98
=5+0.98
=5.98;
(2)4.05÷0.81+2.4
=5+2.4
=7.4;
(3)0.25×16.2×4
=0.25×4×16.2
=1×16.2
=16.2;
(4)(3.24+2.6)×(1-0.75)
=5.84×0.25
=1.46;
(5)13.6×0.5-3.6÷2
=13.6×0.5-3.6×0.5
=(13.6-3.6)×0.5
=10×0.5
=5;
(6)56.5×99+56.5
=56.5×(99+1)
=56.5×100
=5650.
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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