题目内容
A、195
÷195=______;195÷195
=______
B、
+
+
+…+
+
=______.
| 195 |
| 196 |
| 195 |
| 196 |
B、
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 98×99 |
| 1 |
| 99×100 |
(1)195
÷195,
=(195+
)÷195,
=1+
,
=1
;
(2)195÷195
,
=195÷
,
=195×
,
=
;
(3)
+
+
+…+
+
,
=1-
+
-
+
-
+…+
-
+
-
,
=1-
,
=
.
故答案为:1
,
,
.
| 195 |
| 196 |
=(195+
| 195 |
| 196 |
=1+
| 1 |
| 196 |
=1
| 1 |
| 196 |
(2)195÷195
| 195 |
| 196 |
=195÷
| 196×195+1995 |
| 196 |
=195×
| 196 |
| 195×(196+1) |
=
| 196 |
| 197 |
(3)
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 98×99 |
| 1 |
| 99×100 |
=1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 98 |
| 1 |
| 99 |
| 1 |
| 99 |
| 1 |
| 100 |
=1-
| 1 |
| 100 |
=
| 99 |
| 100 |
故答案为:1
| 1 |
| 196 |
| 196 |
| 197 |
| 99 |
| 100 |
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