题目内容
神机妙算细又巧
(
-
+
)÷
0.75×65+
×36-75%
1110÷[56×(
-
)]
(
+
)÷
+
.
(
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 12 |
| 1 |
| 24 |
0.75×65+
| 3 |
| 4 |
1110÷[56×(
| 3 |
| 7 |
| 3 |
| 8 |
(
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
| 3 |
| 10 |
考点:整数、分数、小数、百分数四则混合运算
专题:运算顺序及法则
分析:(1)把除法变为乘法,运用乘法分配律简算.
(2)通过数字转化,运用乘法分配律简算.
(3)中括号内运用乘法分配律简算,最后算括号外的.
(4)先算括号内的加法,再算括号外的除法,最后算括号外的加法.
(2)通过数字转化,运用乘法分配律简算.
(3)中括号内运用乘法分配律简算,最后算括号外的.
(4)先算括号内的加法,再算括号外的除法,最后算括号外的加法.
解答:
解:(1)(
-
+
)÷
=(
-
+
)×24
=
×24-
×24+
×24
=4-3+2
=3
(2)0.75×65+
×36-75%
=0.75×65+0.75×36-0.75
=0.75×(65+36-1)
=0.75×100
=75
(3)1110÷[56×(
-
)]
=1110÷[56×
-56×
]
=1110÷[24-21]
=1110÷3
=370
(4)(
+
)÷
+
=
÷
+
=1+
=1
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 12 |
| 1 |
| 24 |
=(
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 12 |
=
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 12 |
=4-3+2
=3
(2)0.75×65+
| 3 |
| 4 |
=0.75×65+0.75×36-0.75
=0.75×(65+36-1)
=0.75×100
=75
(3)1110÷[56×(
| 3 |
| 7 |
| 3 |
| 8 |
=1110÷[56×
| 3 |
| 7 |
| 3 |
| 8 |
=1110÷[24-21]
=1110÷3
=370
(4)(
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
| 3 |
| 10 |
=
| 5 |
| 6 |
| 5 |
| 6 |
| 3 |
| 10 |
=1+
| 3 |
| 10 |
=1
| 3 |
| 10 |
点评:注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
练习册系列答案
相关题目