题目内容
怎样算简便就怎样算. 148÷0.25÷0.8 |
5.3-1.46-0.54 | 9.09-22.78÷3.4 | 44.28÷0.9÷4.1. |
分析:(1)根据除法的性质进行简算;
(2)根据减法的性质进行简算;
(3)先算除法,再算减法;
(4)按照从左向右的顺序进行计算.
(2)根据减法的性质进行简算;
(3)先算除法,再算减法;
(4)按照从左向右的顺序进行计算.
解答:解:(1)148÷0.25÷0.8
=148÷(0.25×0.8)
=148÷0.2
=740;
(2)5.3-1.46-0.54
=5.3-(1.46+0.54)
=5.3-2
=3.3;
(3)9.09-22.78÷3.4
=9.09-6.7
=2.39;
(4)44.28÷0.9÷4.1
=49.2÷4.1
=12.
=148÷(0.25×0.8)
=148÷0.2
=740;
(2)5.3-1.46-0.54
=5.3-(1.46+0.54)
=5.3-2
=3.3;
(3)9.09-22.78÷3.4
=9.09-6.7
=2.39;
(4)44.28÷0.9÷4.1
=49.2÷4.1
=12.
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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