题目内容
怎样简便就怎样算:
+(
-
)×
;
÷
+0.75×8;
11-
-2.125;
12×(
+
-
).
| 2 |
| 3 |
| 4 |
| 5 |
| 2 |
| 3 |
| 5 |
| 3 |
| 3 |
| 4 |
| 1 |
| 6 |
11-
| 7 |
| 8 |
12×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
算:
+(
-
)×
=
+
×
-
×
=
+
-
=2-
=
;
÷
+0.75×8
=
×6+
×8
=
×(6+8)
=
×14
=
;
11-
-2.125
=11-0.875-2.125
=11-(0.875+1.125)
=11-2
=9;
12×(
+
-
)
=12×
+12×
-12×
=3+2-4
=1.
| 2 |
| 3 |
| 4 |
| 5 |
| 2 |
| 3 |
| 5 |
| 3 |
=
| 2 |
| 3 |
| 4 |
| 5 |
| 5 |
| 3 |
| 2 |
| 3 |
| 5 |
| 3 |
=
| 2 |
| 3 |
| 4 |
| 3 |
| 10 |
| 9 |
=2-
| 10 |
| 9 |
=
| 8 |
| 9 |
| 3 |
| 4 |
| 1 |
| 6 |
=
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 21 |
| 2 |
11-
| 7 |
| 8 |
=11-0.875-2.125
=11-(0.875+1.125)
=11-2
=9;
12×(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=12×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=3+2-4
=1.
练习册系列答案
相关题目