题目内容
直接写出得数.
6÷
| 99×
| (
|
|
(1)6÷
-
÷6,
=20-
,
=19
;
(2)99×
,
=(98+1)×
,
=98×
+1×
,
=97+
,
=97
;
(3)(
+
)÷
-
,
=
÷
-
,
=
-
,
=
;
(4)
-(
+
)÷
,
=
-
÷
,
=
-
,
=
.
| 3 |
| 10 |
| 3 |
| 10 |
=20-
| 1 |
| 20 |
=19
| 19 |
| 20 |
(2)99×
| 97 |
| 98 |
=(98+1)×
| 97 |
| 98 |
=98×
| 97 |
| 98 |
| 97 |
| 98 |
=97+
| 97 |
| 98 |
=97
| 97 |
| 98 |
(3)(
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 5 |
| 17 |
| 18 |
=
| 5 |
| 6 |
| 3 |
| 5 |
| 17 |
| 18 |
=
| 25 |
| 18 |
| 17 |
| 18 |
=
| 4 |
| 9 |
(4)
| 9 |
| 10 |
| 1 |
| 4 |
| 7 |
| 20 |
| 3 |
| 4 |
=
| 9 |
| 10 |
| 3 |
| 5 |
| 3 |
| 4 |
=
| 9 |
| 10 |
| 4 |
| 5 |
=
| 1 |
| 10 |
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