早教吧作业答案频道 -->数学-->
用简便方法计算:(1)−1.53×0.75+1.53×12+45×1.53(2)(213−312+1912)÷(−116).
题目详情
用简便方法计算:
(1)−1.53×0.75+1.53×
+
×1.53
(2)(2
−3
+1
)÷(−1
).
(1)−1.53×0.75+1.53×
1 |
2 |
4 |
5 |
(2)(2
1 |
3 |
1 |
2 |
9 |
12 |
1 |
6 |
▼优质解答
答案和解析
(1)-1.53×0.75+1.53×
+
×1.53,
=1.53×(-0.75+0.5+0.8),
=1.53×(1.3-0.75),
=1.53×0.55,
=0.8415;
(2)(2
-3
+1
)÷(-1
),
=(
-
+
)×(-
),
=
×(-
)-
×(-
)+
×(-
),
=-2+3-
,
=3-3
,
=-
.
1 |
2 |
4 |
5 |
=1.53×(-0.75+0.5+0.8),
=1.53×(1.3-0.75),
=1.53×0.55,
=0.8415;
(2)(2
1 |
3 |
1 |
2 |
9 |
12 |
1 |
6 |
=(
7 |
3 |
7 |
2 |
21 |
12 |
6 |
7 |
=
7 |
3 |
6 |
7 |
7 |
2 |
6 |
7 |
21 |
12 |
6 |
7 |
=-2+3-
3 |
2 |
=3-3
1 |
2 |
=-
1 |
2 |
看了 用简便方法计算:(1)−1....的网友还看了以下:
脱式计算,能简算的要简算.511×79+79×61151×10110.25-3.75-6.25+7 2020-04-07 …
还有-3的二次方三次方怎么算?您好,请问-4.3-(-6.3)+(-3)=?(-100)÷5×(- 2020-04-27 …
8年级数学题:3的n次方+m能被13整除,证明3的n+3次方能被13整除.急用,谢谢刚知道:3^( 2020-05-15 …
初一下半学期数学练习册题目P14习题12.7(2)(3的1/3次方除以2的1/2次方)的6次方第2 2020-05-23 …
7.25-3.65+3.75-6.35 2020-06-02 …
化合物A(C4H8O2),在CDcl3中策的1HNMR数据如下:1.35(d),2.15(s),3 2020-06-05 …
(1)19.28+1.82÷0.7(2)10.56×3.75﹣3.75×0.56(3)(71.2﹣ 2020-07-17 …
能简算的要简算:19.28+1.82÷0.710.56×3.75-3.75×0.56(71.2-7 2020-07-17 …
1.在数轴上表示下列各数:负5,正3,负3.5,0,3分之2,负2分之3,0.75.2.在数轴1.在 2020-11-20 …
帮我解一下这些方程,很急,要过程,谢谢1)0.25r-0.32=0.45r+0.192)15.3c+ 2020-12-17 …