题目内容
递等式计算.
| (1) | (2) | (3) |
| (4) | (5) | (6)36×( |
| (7) | (8)7×30% | (9) |
| (10)12×( | (11)4÷4% |
解:(1)
×
+
×
,
=
(
),
=
1,
=
;
(2)
÷
+
÷
,
=(
)×
,
=1×
,
=
;
(3)
÷(
-
),
=
,
=4
;
(4)
+
÷
,
=
,
=
;
(5)
×
÷
,
=
,
=4;
(6)36×(
+
)÷
,
=(36×
)
,
=(28+30)
,
=58
,
=10;
(7)
×56×
,
=(
8)×(7×
),
=1×2,
=2;
(8)7×30%=2.1;
(9)
×6%=0.01;
(10)12×(
+
),
=12×
,
=6+9,
=15;
(11)4÷4%=100.
分析:(1)(2)(6)(10)运用乘法分配律解答,
(3)(4)(5)(8)(9)(11)依据分数四则运算计算方法解答,
(7)化56=8×7,再运用乘法结合律解答.
点评:本题考查知识点:(1)分数四则运算计算方法,(2)简便算法运用.
=
=
=
(2)
=(
=1×
=
(3)
=
=4
(4)
=
=
(5)
=
=4;
(6)36×(
=(36×
=(28+30)
=58
=10;
(7)
=(
=1×2,
=2;
(8)7×30%=2.1;
(9)
(10)12×(
=12×
=6+9,
=15;
(11)4÷4%=100.
分析:(1)(2)(6)(10)运用乘法分配律解答,
(3)(4)(5)(8)(9)(11)依据分数四则运算计算方法解答,
(7)化56=8×7,再运用乘法结合律解答.
点评:本题考查知识点:(1)分数四则运算计算方法,(2)简便算法运用.
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