题目内容
下列各题能简算的要简算.
| 3.1+2.4+1.9+3.6 | 300-288÷24 | 48×(
| 0.46×98+0.92 | ||||||||||||
| 21÷(
|
(1)3.1+2.4+1.9+3.6,
=(3.1+1.9)+(2.4+3.6),
=5+6,
=11;
(2)300-288÷24,
=300-12,
=288;
(3)48×(
+
),
=48×
+48×
,
=18+40,
=58;
(4)0.46×98+0.92,
=0.46×(100-2)+0.92,
=0.46×100-0.46×2+0.92,
=46-0.92+0.92,
=46;
(5)
×
÷
×
,
=(
÷
)×(
×
),
=1×0.16,
=0.16;
(6)21÷(
+
)÷
,
=21÷
÷
,
=21÷(
×
),
=21÷
,
=35.
=(3.1+1.9)+(2.4+3.6),
=5+6,
=11;
(2)300-288÷24,
=300-12,
=288;
(3)48×(
| 3 |
| 8 |
| 5 |
| 6 |
=48×
| 3 |
| 8 |
| 5 |
| 6 |
=18+40,
=58;
(4)0.46×98+0.92,
=0.46×(100-2)+0.92,
=0.46×100-0.46×2+0.92,
=46-0.92+0.92,
=46;
(5)
| 4 |
| 5 |
| 2 |
| 5 |
| 4 |
| 5 |
| 2 |
| 5 |
=(
| 4 |
| 5 |
| 4 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
=1×0.16,
=0.16;
(6)21÷(
| 1 |
| 3 |
| 2 |
| 5 |
| 9 |
| 11 |
=21÷
| 11 |
| 15 |
| 9 |
| 11 |
=21÷(
| 11 |
| 15 |
| 9 |
| 11 |
=21÷
| 3 |
| 5 |
=35.
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