题目内容
(2006?海淀区)脱式计算
(1)4000-592÷37
(2)5-1.05×2.4
(3 )
÷(2-
×3)
(1)4000-592÷37
(2)5-1.05×2.4
(3 )
9 |
10 |
1 |
3 |
分析:(1)先算除法,再算减法;
(2)先算乘法,再算减法;
(3)先算小括号里面的乘法,再算小括号里面的减法,最后算括号外的除法.
(2)先算乘法,再算减法;
(3)先算小括号里面的乘法,再算小括号里面的减法,最后算括号外的除法.
解答:解:(1)4000-592÷37,
=4000-16,
=3984;
(2)5-1.05×2.4,
=5-2.52,
=2.48;
(3)
÷(2-
×3),
=
÷(2-1),
=
÷1,
=
.
=4000-16,
=3984;
(2)5-1.05×2.4,
=5-2.52,
=2.48;
(3)
9 |
10 |
1 |
3 |
=
9 |
10 |
=
9 |
10 |
=
9 |
10 |
点评:此题考查了四则混合运算的顺序,计算时要做到准确无误.
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