题目内容
| 脱式计算,能简算的要简算 495÷55+495÷45 | 5-(
|
|
|
(1)495÷55+495÷45
=495÷5÷11+495÷5÷9,
=99÷11+99÷9,
=9+11,
=20;
(2)5-(
÷
+
)
=5-(
×
+
),
=5-(4+
),
=5-4
,
=
;
=0.7×80×12.5,
=0.7×(80×12.5),
=0.7×1000,
=700;
(4)
×
+
÷
=
×
+
×
,
=(
+
)×
,
=1×
,
=
.
=495÷5÷11+495÷5÷9,
=99÷11+99÷9,
=9+11,
=20;
(2)5-(
| 6 |
| 7 |
| 3 |
| 14 |
| 6 |
| 13 |
=5-(
| 6 |
| 7 |
| 14 |
| 3 |
| 6 |
| 13 |
=5-(4+
| 6 |
| 13 |
=5-4
| 6 |
| 13 |
=
| 7 |
| 13 |
(3)
|
=0.7×(80×12.5),
=0.7×1000,
=700;
(4)
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 10 |
| 11 |
=
| 5 |
| 8 |
| 11 |
| 10 |
| 3 |
| 8 |
| 11 |
| 10 |
=(
| 5 |
| 8 |
| 3 |
| 8 |
| 11 |
| 10 |
=1×
| 11 |
| 10 |
=
| 11 |
| 10 |
练习册系列答案
相关题目