早教吧作业答案频道 -->其他-->
计算(要灵活使用运算律哟).×+÷=;7.28-3.14+1.72-2.86=;(+-)×36=;[(5-4.75)÷1+2.7]×0.4=.
题目详情
计算(要灵活使用运算律哟).
×+÷=________;
7.28-3.14+1.72-2.86=________;
(+-)×36=________;
[(5-4.75)÷1+2.7]×0.4=________.
×+÷=________;
7.28-3.14+1.72-2.86=________;
(+-)×36=________;
[(5-4.75)÷1+2.7]×0.4=________.
▼优质解答
答案和解析
3 1 1.18
(1)×+÷,
=×+×,
=(+)×,
=1×,
=;
(2)7.28-3.14+1.72-2.86,
=(7.28+1.72)-(3.14+2.86),
=9-6,
=3;
(3)(+-)×36,
=×36+×36-×36,
=3+4-6,
=1;
(4)[(5-4.75)÷1+2.7]×0.4,
=[0.25÷1+2.7]×0.4,
=[0.25+2.7]×0.4,
=0.25×0.4+2.7×0.4,
=0.1+1.08,
=1.18.
故答案为:,3,1,1.18.
(1)×+÷,
=×+×,
=(+)×,
=1×,
=;
(2)7.28-3.14+1.72-2.86,
=(7.28+1.72)-(3.14+2.86),
=9-6,
=3;
(3)(+-)×36,
=×36+×36-×36,
=3+4-6,
=1;
(4)[(5-4.75)÷1+2.7]×0.4,
=[0.25÷1+2.7]×0.4,
=[0.25+2.7]×0.4,
=0.25×0.4+2.7×0.4,
=0.1+1.08,
=1.18.
故答案为:,3,1,1.18.
看了 计算(要灵活使用运算律哟)....的网友还看了以下:
给出下列算式3²-1²=8×1,5²-3²=16=8×2,7²-5²=24=8×3,9²-7²=3 2020-05-22 …
99×28=100×28-28和125×72=125×8×9各运用了什么运算定律?运算定律:(1) 2020-06-06 …
有一天张老师在黑板上写出三个等式:5^-3^=8*2……9^-7^=8*4,15^-3^=8*27 2020-07-09 …
找规律计算:99-97+95-93+91-89+……+7-5-3-1找规律计算:99-97+95- 2020-07-17 …
1+2+1=1+2+3+2+1=1+2+3+4+3+2+1=根据上面的规律,计算1+2+3+1+2 2020-07-18 …
计算(1)8+(-10)+(-2)-(-5)(2)213-25-35+(-113)(3)(-34) 2020-07-19 …
完成下列算式1+3=?1+3+5=?1+3+5+7=?(1)通过计算,探索规律;(2)利用探索规律 2020-07-24 …
按照找出的规律计算0.1+0.3+0.5+0.7+...+201.1+201.3等于多少?观察下面 2020-07-26 …
利用加法交换律,结合律计算以下各试1+(-2分之1)+4分之1+(-2分之3)3又4分之1+(4又 2020-07-31 …
阅读下列计算过程,发现规律,然后利用规律计算:1+2=(1+2)×22=31+2+3=(1+3)×3 2020-11-01 …