题目内容
脱式计算:
÷
×
÷6
24×(
+
)
3-1÷(
+
×
)
1.75×
+
×
+
(
-
)÷(
+
)
+
+
+
+
+
.
| 3 |
| 8 |
| 3 |
| 4 |
| 2 |
| 3 |
24×(
| 3 |
| 8 |
| 3 |
| 4 |
3-1÷(
| 5 |
| 7 |
| 6 |
| 7 |
| 1 |
| 3 |
1.75×
| 6 |
| 7 |
| 3 |
| 14 |
| 7 |
| 4 |
| 7 |
| 4 |
(
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 9 |
| 1 |
| 3 |
| 1 |
| 42 |
| 1 |
| 56 |
| 1 |
| 72 |
| 1 |
| 90 |
| 1 |
| 110 |
| 1 |
| 132 |
考点:分数的四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)从左向右依次计算即可;
(2)(4)根据乘法分配律简算即可;
(3)首先计算小括号里面的,然后计算除法,最后计算减法即可;
(5)首先计算小括号里面的,然后计算除法即可;
(6)首先把
+
+
+
+
+
化成
-
+
-
+
-
+
-
+
-
+
-
,然后计算即可.
(2)(4)根据乘法分配律简算即可;
(3)首先计算小括号里面的,然后计算除法,最后计算减法即可;
(5)首先计算小括号里面的,然后计算除法即可;
(6)首先把
| 1 |
| 42 |
| 1 |
| 56 |
| 1 |
| 72 |
| 1 |
| 90 |
| 1 |
| 110 |
| 1 |
| 132 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 10 |
| 1 |
| 11 |
| 1 |
| 11 |
| 1 |
| 12 |
解答:
解:(1)
÷
×
÷6
=
×
÷6
=
÷6
=
(2)24×(
+
)
=24×
+24×
=9+18
=27
(3)3-1÷(
+
×
)
=3-1÷1
=3-1
=2
(4)1.75×
+
×
+
=
×
+
×
+
=
×(
+
+1)
=
×
=3
(5)(
-
)÷(
+
)
=
÷
=
(6)
+
+
+
+
+
=
-
+
-
+
-
+
-
+
-
+
-
=
-
=
| 3 |
| 8 |
| 3 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 2 |
| 2 |
| 3 |
=
| 1 |
| 3 |
=
| 1 |
| 18 |
(2)24×(
| 3 |
| 8 |
| 3 |
| 4 |
=24×
| 3 |
| 8 |
| 3 |
| 4 |
=9+18
=27
(3)3-1÷(
| 5 |
| 7 |
| 6 |
| 7 |
| 1 |
| 3 |
=3-1÷1
=3-1
=2
(4)1.75×
| 6 |
| 7 |
| 3 |
| 14 |
| 7 |
| 4 |
| 7 |
| 4 |
=
| 7 |
| 4 |
| 6 |
| 7 |
| 3 |
| 14 |
| 7 |
| 4 |
| 7 |
| 4 |
=
| 7 |
| 4 |
| 6 |
| 7 |
| 3 |
| 14 |
=
| 7 |
| 4 |
| 29 |
| 14 |
=3
| 5 |
| 8 |
(5)(
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 9 |
| 1 |
| 3 |
=
| 3 |
| 8 |
| 11 |
| 9 |
=
| 27 |
| 88 |
(6)
| 1 |
| 42 |
| 1 |
| 56 |
| 1 |
| 72 |
| 1 |
| 90 |
| 1 |
| 110 |
| 1 |
| 132 |
=
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 10 |
| 1 |
| 11 |
| 1 |
| 11 |
| 1 |
| 12 |
=
| 1 |
| 6 |
| 1 |
| 12 |
=
| 1 |
| 12 |
点评:此题主要考查了分数的四则混合运算,注意运算顺序,注意乘法运算定律的应用.
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