题目内容
计算(能简算的要简算).
15÷
+
×8
×
÷
(
+
)×35
×3+
×3 4÷(5-
-
) 5.6×
+4.4÷
.
15÷
| 5 |
| 9 |
| 1 |
| 4 |
| 4 |
| 9 |
| 3 |
| 5 |
| 5 |
| 12 |
| 1 |
| 7 |
| 1 |
| 5 |
| 7 |
| 18 |
| 11 |
| 18 |
| 5 |
| 12 |
| 7 |
| 12 |
| 3 |
| 4 |
| 4 |
| 3 |
考点:整数、分数、小数、百分数四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)按照先同时算除法和乘法,再算加法顺序计算解答,
(2)按照从左到右顺序计算解答,
(3)(4)(6)运用乘法分配律解答,
(5)运用减法性质解答.
(2)按照从左到右顺序计算解答,
(3)(4)(6)运用乘法分配律解答,
(5)运用减法性质解答.
解答:
解:(1)15÷
+
×8
=27+2
=29;
(2)
×
÷
=
÷
=
;
(3)(
+
)×35
=
×35+
×35
=5+7
=12;
(4)
×3+
×3
=(
+
)×3
=1×3
=3;
(5)4÷(5-
-
)
=4÷[5-(
+
)]
=4÷[5-1]
=4÷4
=1;
(6)5.6×
+4.4÷
=(5.6+4.4)×
=10×
=7
.
| 5 |
| 9 |
| 1 |
| 4 |
=27+2
=29;
(2)
| 4 |
| 9 |
| 3 |
| 5 |
| 5 |
| 12 |
=
| 4 |
| 15 |
| 5 |
| 12 |
=
| 16 |
| 25 |
(3)(
| 1 |
| 7 |
| 1 |
| 5 |
=
| 1 |
| 7 |
| 1 |
| 5 |
=5+7
=12;
(4)
| 7 |
| 18 |
| 11 |
| 18 |
=(
| 7 |
| 18 |
| 11 |
| 18 |
=1×3
=3;
(5)4÷(5-
| 5 |
| 12 |
| 7 |
| 12 |
=4÷[5-(
| 5 |
| 12 |
| 7 |
| 12 |
=4÷[5-1]
=4÷4
=1;
(6)5.6×
| 3 |
| 4 |
| 4 |
| 3 |
=(5.6+4.4)×
| 3 |
| 4 |
=10×
| 3 |
| 4 |
=7
| 1 |
| 2 |
点评:(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,是本题考查知识点.
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