题目内容
能简算的要简算.
8×
+
÷4
55÷11+
÷11
×
÷
÷8+
×
.
8×
5 |
6 |
2 |
5 |
55÷11+
11 |
14 |
1 |
7 |
9 |
13 |
3 |
13 |
16 |
17 |
1 |
17 |
1 |
8 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)先算乘除,再算加法.
(2)先算除法,再算加法.
(3)把除法变为乘法,约分计算.
(4)把除法变为乘法,运用乘法分配律简算.
(2)先算除法,再算加法.
(3)把除法变为乘法,约分计算.
(4)把除法变为乘法,运用乘法分配律简算.
解答:
解:(1)8×
+
÷4
=8×
+
×
=
+
=
(2)55÷11+
÷11
=5+
=5
(3)
×
÷
=
×
×
=
(4)
÷8+
×
=(
+
)×
=1×
=
5 |
6 |
2 |
5 |
=8×
5 |
6 |
2 |
5 |
1 |
4 |
=
20 |
3 |
1 |
10 |
=
203 |
30 |
(2)55÷11+
11 |
14 |
=5+
1 |
14 |
=5
1 |
14 |
(3)
1 |
7 |
9 |
13 |
3 |
13 |
=
1 |
7 |
9 |
13 |
13 |
3 |
=
3 |
7 |
(4)
16 |
17 |
1 |
17 |
1 |
8 |
=(
16 |
17 |
1 |
17 |
1 |
8 |
=1×
1 |
8 |
=
1 |
8 |
点评:此题考查了分数的四则混合运算,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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