题目内容
(2006?宜兴市)用递等式计算
(1)(1-0.16×0.35)÷0.04
(2)
÷[(
-
)÷
].
(1)(1-0.16×0.35)÷0.04
(2)
3 |
5 |
3 |
4 |
2 |
3 |
5 |
6 |
分析:(1)先算括号里面的乘法,再算减法,最后算括号外面的除法;
(2)先算小括号里的减法,再算中括号里的除法,最后算中括号外面的除法.
(2)先算小括号里的减法,再算中括号里的除法,最后算中括号外面的除法.
解答:解:(1)(1-0.16×0.35)÷0.04,
=(1-0.056)÷0.04,
=0.944÷0.04,
=23.6;
(2)
÷[(
-
)÷
],
=
÷[
÷
],
=
÷
,
=6.
=(1-0.056)÷0.04,
=0.944÷0.04,
=23.6;
(2)
3 |
5 |
3 |
4 |
2 |
3 |
5 |
6 |
=
3 |
5 |
1 |
12 |
5 |
6 |
=
3 |
5 |
1 |
10 |
=6.
点评:此题主要考查四则混合运算.注意运算顺序和运算法则.
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