题目内容
下面各题怎样简便怎样算.
①0.375×5.8+
×5.8
②12÷
-20×5%
③(4.16×
+3
×4.16)×25.
①0.375×5.8+
| 5 |
| 8 |
②12÷
| 4 |
| 7 |
③(4.16×
| 9 |
| 11 |
| 2 |
| 11 |
(1)0.375×5.8+
×5.8,
=5.8×(0.375+
),
=5.8×(
+
),
=5.8×1,
=5.8;
(2)12÷
-20×5%,
=12×
-20×
,
=21-1,
=20;
(3)(4.16×
+3
×4.16)×25,
=[4.16×(
+3
)]×25,
=[4.16×4]×25,
=4.16×4×25,
=4.16×(4×25),
=4.16×100,
=416.
| 5 |
| 8 |
=5.8×(0.375+
| 5 |
| 8 |
=5.8×(
| 3 |
| 8 |
| 5 |
| 8 |
=5.8×1,
=5.8;
(2)12÷
| 4 |
| 7 |
=12×
| 7 |
| 4 |
| 1 |
| 20 |
=21-1,
=20;
(3)(4.16×
| 9 |
| 11 |
| 2 |
| 11 |
=[4.16×(
| 9 |
| 11 |
| 2 |
| 11 |
=[4.16×4]×25,
=4.16×4×25,
=4.16×(4×25),
=4.16×100,
=416.
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