题目内容
下面各题,怎样简便就怎样算.
. |
解:
(1),
=÷,
=1÷,
=;
(2),
=,
=;
(3),
=×56,
=35;
(4),
=24-0.6,
=23.4;
(5),
=÷[3-()],
=÷[3-1],
=÷2,
=;
(6),
=×,
=.
分析:(1)根据乘法交换律进行简算;
(2)根据乘法分配律进行简算;
(3)按照从左向右的顺序进行计算;
(4)先算除法,再算减法;
(5)小括号里面的根据减法的性质进行简算,最后算除法;
(6)先算减法,再算乘法.
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律简便计算.
(1),
=÷,
=1÷,
=;
(2),
=,
=;
(3),
=×56,
=35;
(4),
=24-0.6,
=23.4;
(5),
=÷[3-()],
=÷[3-1],
=÷2,
=;
(6),
=×,
=.
分析:(1)根据乘法交换律进行简算;
(2)根据乘法分配律进行简算;
(3)按照从左向右的顺序进行计算;
(4)先算除法,再算减法;
(5)小括号里面的根据减法的性质进行简算,最后算除法;
(6)先算减法,再算乘法.
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律简便计算.
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