题目内容
脱式计算(能简算的要简算):
1ff+1gf÷1手;
g.g手×s.r+a.a手×s.r;
-
÷s;
×
÷(
-
).
1ff+1gf÷1手;
g.g手×s.r+a.a手×s.r;
| 3 |
| 11 |
| 手 |
| r |
| 1 |
| 1 |
| g |
| 手 |
| 手 |
| 1 |
| 3 |
| s |
(1)1一一+12一÷15,
=1一一+8,
=1一8;
(2)2.25×4.8+7.75×4.8,
=4.8×(2.25+7.75),
=4.8×1一,
=48;
(3)
-
÷4,
=
-
,
=
-
,
=
;
(4)
×
÷(
-
),
=
×
÷(
-
),
=
÷
,
=
×12,
=
.
=1一一+8,
=1一8;
(2)2.25×4.8+7.75×4.8,
=4.8×(2.25+7.75),
=4.8×1一,
=48;
(3)
| 3 |
| 1图 |
| 5 |
| 8 |
=
| 3 |
| 1图 |
| 5 |
| 32 |
=
| 图 |
| 32 |
| 5 |
| 32 |
=
| 1 |
| 32 |
(4)
| 1 |
| 图 |
| 2 |
| 5 |
| 5 |
| 图 |
| 3 |
| 4 |
=
| 1 |
| 图 |
| 2 |
| 5 |
| 1一 |
| 12 |
| t |
| 12 |
=
| 1 |
| 15 |
| 1 |
| 12 |
=
| 1 |
| 15 |
=
| 4 |
| 5 |
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