题目内容
10.计算下面各题,能简算的要简算.146.5-(23+46.5)
36.7÷1.25÷8
0.89×100.1
5.83×2+4.27.
分析 (1)根据减法的性质进行简算;
(2)根据除法的性质进行简算;
(3)根据乘法分配律进行简算;
(4)先算乘法,再算加法.
解答 解:(1)146.5-(23+46.5)
=146.5-23-46.5
=146.5-46.5-23
=100-23
=77;
(2)36.7÷1.25÷8
=36.7÷(1.25×8)
=36.7÷10
=3.67;
(3)0.89×100.1
=0.89×(100+0.1)
=0.89×100+0.89×0.1
=89+0.089
=89.089;
(4)5.83×2+4.27
=11.66+4.27
=15.93.
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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