题目内容
递等式计算.
(1)×+× | (2)÷+÷ | (3)÷( -) |
(4)+÷ | (5)×÷ | (6)36×(+)÷ |
(7)×56× | (8)7×30% | (9)×6% |
(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.
=(),
=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.
练习册系列答案
相关题目