题目内容
计算.
| (253-159)×(27÷9) | 6.8+2.37+7.63+4.2 | 11-
|
| 0.6×(5.3-1.7)÷0.9. |
(1)(253-159)×(27÷9),
=94×3,
=282;
(2)6.8+2.37+7.63+4.2,
=(6.8+4.2)+(2.37+7.63),
=11+10,
=21;
(3)11-
-
,
=11-(
+
),
=11-1,
=10;
(4)
÷[(
+
)×
],
=
÷[
×
],
=
÷
,
=
;
(5)0.6×(5.3-1.7)÷0.9,
=0.6×3.6÷0.9,
=2.16÷0.9,
=2.4.
=94×3,
=282;
(2)6.8+2.37+7.63+4.2,
=(6.8+4.2)+(2.37+7.63),
=11+10,
=21;
(3)11-
| 1 |
| 3 |
| 2 |
| 3 |
=11-(
| 1 |
| 3 |
| 2 |
| 3 |
=11-1,
=10;
(4)
| 5 |
| 8 |
| 1 |
| 2 |
| 2 |
| 3 |
| 4 |
| 7 |
=
| 5 |
| 8 |
| 7 |
| 6 |
| 4 |
| 7 |
=
| 5 |
| 8 |
| 2 |
| 3 |
=
| 15 |
| 16 |
(5)0.6×(5.3-1.7)÷0.9,
=0.6×3.6÷0.9,
=2.16÷0.9,
=2.4.
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