题目内容
计算下列各题:
(1)
;
(2)(
+
)÷
;
(3)
+
+
+…+
.
(1)
2
| ||||
| 6!+5! |
(2)(
| C | 2100 |
| C | 3100 |
| A | 3101 |
(3)
| C | 22 |
| C | 23 |
| C | 24 |
| C | 29 |
(1)原式=
=
=
.
(2)原式=
÷
=
÷
=
=
.
(3)原式=(
+
)+
+…
=(
+
)+
+…+
=(
+
)+
+…+
=…=
=120.
| 7!-6! |
| 6!+5! |
| (7×6-6)×5! |
| (6+1)×5! |
| 36 |
| 7 |
(2)原式=
| C | 98101 |
| A | 3101 |
| C | 3101 |
| A | 3101 |
| 1 | ||
|
| 1 |
| 6 |
(3)原式=(
| C | 33 |
| C | 23 |
| C | 24 |
| C | 210 |
| C | 34 |
| C | 24 |
| C | 25 |
| C | 29 |
| C | 35 |
| C | 25 |
| C | 26 |
| C | 29 |
| C | 310 |
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