题目内容
计算下列各式:
(1)|-21|+|-10|+|+9|;
(2)|+3
|×|-
|;
(3)
+
÷
;
(4)6.5×
-
.
(1)|-21|+|-10|+|+9|;
(2)|+3
| 1 |
| 3 |
| 9 |
| 20 |
(3)
| 3 |
| 8 |
| 1 |
| 4 |
| 2 |
| 5 |
(4)6.5×
| 3 |
| 5 |
| 2 |
| 5 |
(1)原式=21+10+9=40;
(2)原式=
×
=
;
(3)原式=
+
=1;
(4)原式=3.9-
=3.5.
(2)原式=
| 10 |
| 3 |
| 9 |
| 20 |
| 3 |
| 2 |
(3)原式=
| 3 |
| 8 |
| 5 |
| 8 |
(4)原式=3.9-
| 2 |
| 5 |
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