题目内容
计算．
[
-
÷（4.9-3.4）]×
6×
+0.75×2
×[
+（
-0.25）]
÷
+
÷
．
[
| 1 |
| 4 |
| 1 |
| 4 |
| 4 |
| 13 |
6×
| 3 |
| 4 |
| 8 |
| 9 |
| 7 |
| 8 |
| 1 |
| 4 |
| 2 |
| 3 |
| 5 |
| 8 |
| 1 |
| 3 |
| 5 |
| 8 |
（1）[
-
÷（4.9-3.4）]×
=[
-
÷1.5]×
=[
-
÷
]×
=[
-
×
]×
=
×[1-
]×
=
×
×
=
；
（2）6×
+0.75×2
=6×
+
×2
=（6+2）×
=8×
=6；
（3）
×[
+（
-0.25）]
=
×[
+（
-
）]
=
×
=
；
（4）
÷
+
÷
=
×
+
×
=（
+
）×
=1×
=
．
| 1 |
| 4 |
| 1 |
| 4 |
| 4 |
| 13 |
=[
| 1 |
| 4 |
| 1 |
| 4 |
| 4 |
| 13 |
=[
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 2 |
| 4 |
| 13 |
=[
| 1 |
| 4 |
| 1 |
| 4 |
| 2 |
| 3 |
| 4 |
| 13 |
=
| 1 |
| 4 |
| 2 |
| 3 |
| 4 |
| 13 |
=
| 1 |
| 4 |
| 1 |
| 3 |
| 4 |
| 13 |
=
| 1 |
| 39 |
（2）6×
| 3 |
| 4 |
=6×
| 3 |
| 4 |
| 3 |
| 4 |
=（6+2）×
| 3 |
| 4 |
=8×
| 3 |
| 4 |
=6；
（3）
| 8 |
| 9 |
| 7 |
| 8 |
| 1 |
| 4 |
=
| 8 |
| 9 |
| 7 |
| 8 |
| 1 |
| 4 |
| 1 |
| 4 |
=
| 8 |
| 9 |
| 7 |
| 8 |
=
| 7 |
| 9 |
（4）
| 2 |
| 3 |
| 5 |
| 8 |
| 1 |
| 3 |
| 5 |
| 8 |
=
| 2 |
| 3 |
| 8 |
| 5 |
| 1 |
| 3 |
| 5 |
| 8 |
=（
| 2 |
| 3 |
| 1 |
| 3 |
| 5 |
| 8 |
=1×
| 5 |
| 8 |
=
| 5 |
| 8 |
练习册系列答案
阅读快车系列答案
相关题目