早教吧作业答案频道 -->数学-->
下面各题,能简算的要用简便方法计算.19.8-(9.8+0.3)35.7-2.8×2+1.40.5×(8.55-6.15)÷0.251.25×32×2.55.83×0.9-4.83×0.91÷(8×0.125-0.8)
题目详情
下面各题,能简算的要用简便方法计算.
19.8-(9.8+0.3) | 35.7-2.8×2+1.4 | 0.5×(8.55-6.15)÷0.25 |
1.25×32×2.5 | 5.83×0.9-4.83×0.9 | 1÷(8×0.125-0.8) |
▼优质解答
答案和解析
①19.8-(9.8+0.3)
=19.8-9.8-0.3
=10-0.3
=9.7
②35.7-2.8×2+1.4
=35.7-5.6+1.4
=30.1+1.4
=31.5
③0.5×(8.55-6.15)÷0.25
=0.5×4×(8.55-6.15)÷0.25×4
=2×2.4÷1
=4.8
④2.5×1.25×32
=2.5×1.25×4×8
=(2.5×4)×(1.25×8)
=10×10
=100
⑤5.83×0.9-4.83×0.9
=0.9×(5.83-4.83)
=0.9×1
=0.9
⑥1÷(8×0.125-0.8)
=1÷(8×0.125-0.8)
=1÷0.2
=5
=19.8-9.8-0.3
=10-0.3
=9.7
②35.7-2.8×2+1.4
=35.7-5.6+1.4
=30.1+1.4
=31.5
③0.5×(8.55-6.15)÷0.25
=0.5×4×(8.55-6.15)÷0.25×4
=2×2.4÷1
=4.8
④2.5×1.25×32
=2.5×1.25×4×8
=(2.5×4)×(1.25×8)
=10×10
=100
⑤5.83×0.9-4.83×0.9
=0.9×(5.83-4.83)
=0.9×1
=0.9
⑥1÷(8×0.125-0.8)
=1÷(8×0.125-0.8)
=1÷0.2
=5
看了 下面各题,能简算的要用简便方...的网友还看了以下:
1.8/9×15/36+1/272.12×5/6–2/9×33.7×5/49+3/1414.7×5 2020-04-07 …
1/301/421/561/721/90=?答案为1/101/30+1/42+1/56+1/72+ 2020-04-07 …
1/301/421/561/721/90=?答案为1/101/30+1/42+1/56+1/72+ 2020-04-07 …
8,12,24,60,()括号里填什么数字8,12,24,60,()1,1,3,2,5,4,7() 2020-05-13 …
因为:1³=1×1×1=1 2³=2×2×2=8 1³+2³=1+8=9 (1+2)²=3×3=9 2020-05-16 …
跪求下面九宫格数独答案**4***37*1**2*8***6***7***9*7*3*1*6*** 2020-05-21 …
1+1/1*3+1/2*3+1/2*5+1/3*5+1/3*7+1/4*7+1/4*9原式=2*[ 2020-06-11 …
2014年我省财政收入比2013年增长8.9%,2015年比2014年增长9.5%,若2013年和 2020-06-19 …
看清数据,细心计算745+2008=185×59=12+15=1÷23=1.1×8.9-8.9=1 2020-07-18 …
观察下列各式:1^3+2^3=1+8=9,而(1+2)^2=9……观察下列各式:1^3+2^3=1+ 2021-01-01 …