早教吧作业答案频道 -->其他-->
下面各题,怎样算简便就怎样算.①0.0618×160+6.18×8.4②89×[34÷(716-14)]③47×6+47+4×110+910×4④2.5×1.6(用三种不同算法简算)
题目详情
下面各题,怎样算简便就怎样算.
①0.0618×160+6.18×8.4
②
×[
÷(
-
)]
③
×6+
+4×
+
×4
④2.5×1.6 (用三种不同算法简算)
①0.0618×160+6.18×8.4
②
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
③
4 |
7 |
4 |
7 |
1 |
10 |
9 |
10 |
④2.5×1.6 (用三种不同算法简算)
▼优质解答
答案和解析
(1)0.0618×160+6.18×8.4,
=6.18×1.6+6.18×8.4,
=(1.6+8.4)×6.18,
=10×6.18,
=61.8;
(2)
×[
÷(
-
)],
=
×[
÷
]
=
×4,
=3
;
(3)
×6+
+4×
+
×4,
=
×(6+1)+(
+
)×4,
=4+4,
=8;
(4)2.5×1.6,
=2.5×(4×0.4),
=2.5×4×0.4,
=10×0.4,
=4;
2.5×1.6,
=2.5×(1+0.6),
=2.5×1+2.5×0.6,
=2.5+1.5,
=4;
2.5×1.6,
=2.5×(2×0.8),
=5×0.8,
=4.
=6.18×1.6+6.18×8.4,
=(1.6+8.4)×6.18,
=10×6.18,
=61.8;
(2)
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
=
8 |
9 |
3 |
4 |
3 |
16 |
=
8 |
9 |
=3
5 |
9 |
(3)
4 |
7 |
4 |
7 |
1 |
10 |
9 |
10 |
=
4 |
7 |
1 |
10 |
9 |
10 |
=4+4,
=8;
(4)2.5×1.6,
=2.5×(4×0.4),
=2.5×4×0.4,
=10×0.4,
=4;
2.5×1.6,
=2.5×(1+0.6),
=2.5×1+2.5×0.6,
=2.5+1.5,
=4;
2.5×1.6,
=2.5×(2×0.8),
=5×0.8,
=4.
看了 下面各题,怎样算简便就怎样算...的网友还看了以下:
用竖式计算,带★号的要验算47×25=4.3-3.5=516÷3=544÷9=★39×26=★60 2020-04-07 …
1.计算(-47.65)*2又6/11+(-37.15)*(-2又6/11)+10.5*(-1又5 2020-04-27 …
求数学换算,47公斤换算成千克是多少? 2020-05-22 …
简算,47乘48分之43 2020-06-10 …
计算47+58-79时,先算法,再算法,结果得.计算74×(12-60÷15)时,先算法,再算法, 2020-07-17 …
简算47×99+47时,应用[]A.乘法交换律B.乘法结合律C.乘法分配律D.乘法交换律和结合律 2020-07-31 …
口算心算速算47页 2020-10-30 …
能简算要简算47/37x25-25/37x10 2020-10-31 …
解释一下“各部门预算由本部门所属各单位预算组成。”还有“本级政府财政部门应当自决算批准之日起20日内 2020-12-15 …
行政数字运算请各位高手帮解说下面各题是如何得出答案的.47.一个数是10,另一个数比它小2.75,另 2020-12-31 …