题目内容
| 计算下面各题. 675-225÷15×45 | 3.5×2.6+5.4÷18 | ||||||||
(3
| (3.86+2×3.86+3.86)×0.25. |
(1)675-225÷15×45,
=675-15×45,
=675-675,
=0;
(2)3.5×2.6+5.4÷18,
=9.1+0.3,
=9.4;
(3)(3
-2
)÷(
+
),
=
÷
,
=
;
(4)(3.86+2×3.86+3.86)×0.25,
=(3.86×4)×0.25,
=3.86×(4×0.25),
=3.86×1,
=3.86.
=675-15×45,
=675-675,
=0;
(2)3.5×2.6+5.4÷18,
=9.1+0.3,
=9.4;
(3)(3
| 5 |
| 6 |
| 3 |
| 4 |
| 2 |
| 7 |
| 13 |
| 14 |
=
| 13 |
| 12 |
| 17 |
| 14 |
=
| 91 |
| 102 |
(4)(3.86+2×3.86+3.86)×0.25,
=(3.86×4)×0.25,
=3.86×(4×0.25),
=3.86×1,
=3.86.
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