题目内容
计算,怎样简便就怎样算
(1)3
×1
×
(2)25
×4
(3)
÷10+
(4)(
+
)×27
(5)1
×5.6+
(6)35×1
×3
.
(1)3
| 1 |
| 5 |
| 5 |
| 6 |
| 3 |
| 8 |
(2)25
| 25 |
| 28 |
(3)
| 7 |
| 10 |
| 7 |
| 10 |
(4)(
| 2 |
| 9 |
| 2 |
| 27 |
(5)1
| 5 |
| 7 |
| 4 |
| 5 |
(6)35×1
| 3 |
| 10 |
| 17 |
| 21 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)(3)(5)(6)按照从左到右顺序计算解答,
(2)(4)运用乘法分配律解答.
(2)(4)运用乘法分配律解答.
解答:
解:(1)3
×1
×
=
×
=2
;
(2)25
×4
=25×4+
×4
=100+3
=103
;
(3)
÷10+
=
+
=
;
(4)(
+
)×27
=
×27+
×27
=6+2
=8;
(5)1
×5.6+
=
+
=10
;
(6)35×1
×3
=
×3
=173
.
| 1 |
| 5 |
| 5 |
| 6 |
| 3 |
| 8 |
=
| 88 |
| 15 |
| 3 |
| 8 |
=2
| 1 |
| 5 |
(2)25
| 25 |
| 28 |
=25×4+
| 25 |
| 28 |
=100+3
| 4 |
| 7 |
=103
| 4 |
| 7 |
(3)
| 7 |
| 10 |
| 7 |
| 10 |
=
| 7 |
| 100 |
| 7 |
| 10 |
=
| 77 |
| 100 |
(4)(
| 2 |
| 9 |
| 2 |
| 27 |
=
| 2 |
| 9 |
| 2 |
| 27 |
=6+2
=8;
(5)1
| 5 |
| 7 |
| 4 |
| 5 |
=
| 48 |
| 5 |
| 4 |
| 5 |
=10
| 2 |
| 5 |
(6)35×1
| 3 |
| 10 |
| 17 |
| 21 |
=
| 91 |
| 2 |
| 17 |
| 21 |
=173
| 1 |
| 3 |
点评:本题考查知识点:(1)依据四则运算计算方法正确进行计算,(2)正确运用简便方法解决问题.
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