题目内容
简便计算
(中)9.我4-(2.我4+0.49)
(2)
÷
+
×
(我)中2.五×0.我2×2五.
(中)9.我4-(2.我4+0.49)
(2)
| 7 |
| 9 |
| 中中 |
| 五 |
| 五 |
| 中中 |
| 2 |
| 9 |
(我)中2.五×0.我2×2五.
(5)9.37-(2.37+一.79)
=9.37-2.37-一.79,
=3-一.79,
=6.55;
(2)
÷
+
×
=
×
+
×
,
=(
+
)×
,
=5×
,
=
;
(3)52.5×一.32×25
=52.5×一.8×一.7×25,
=(52.5×一.8)×(一.7×25),
=5一×5一,
=5一一.
=9.37-2.37-一.79,
=3-一.79,
=6.55;
(2)
| 3 |
| 9 |
| 55 |
| 5 |
| 5 |
| 55 |
| 2 |
| 9 |
=
| 3 |
| 9 |
| 5 |
| 55 |
| 5 |
| 55 |
| 2 |
| 9 |
=(
| 3 |
| 9 |
| 2 |
| 9 |
| 5 |
| 55 |
=5×
| 5 |
| 55 |
=
| 5 |
| 55 |
(3)52.5×一.32×25
=52.5×一.8×一.7×25,
=(52.5×一.8)×(一.7×25),
=5一×5一,
=5一一.
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