题目内容
| 简算 950÷25 | 72×12.5×
| ||||||||
| 18.5×72+1.85×280. |
(1)950÷25,
=(950×4)÷(25×4),
=3800÷100,
=38;
(2)72×12.5×
,
=72×
×12.5,
=8×12.5,
=100;
(3)
-
+
-
,
=(
+
)-(
+
),
=1-
,
=
;
(4)18.5×72+1.85×280,
=18.5×72+18.5×28,
=18.5×(72+28),
=18.5×100,
=1850.
=(950×4)÷(25×4),
=3800÷100,
=38;
(2)72×12.5×
| 1 |
| 9 |
=72×
| 1 |
| 9 |
=8×12.5,
=100;
(3)
| 7 |
| 8 |
| 7 |
| 18 |
| 1 |
| 8 |
| 5 |
| 18 |
=(
| 7 |
| 8 |
| 1 |
| 8 |
| 7 |
| 18 |
| 5 |
| 18 |
=1-
| 2 |
| 3 |
=
| 1 |
| 3 |
(4)18.5×72+1.85×280,
=18.5×72+18.5×28,
=18.5×(72+28),
=18.5×100,
=1850.
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