42.1×0.75-0.579×25+57.9用简便算法怎么算如题
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42.1×0.75-0.579×25+57.9用简便算法怎么算如题42.1×0.75-0.579×25+57.9用简便算法怎么算如题42.1×0.75-0.579×25+57.9用简便算法怎么算如题=
42.1×0.75-0.579×25+57.9用简便算法怎么算如题
42.1×0.75-0.579×25+57.9用简便算法怎么算
如题
42.1×0.75-0.579×25+57.9用简便算法怎么算如题
=42.1*0.75-57.9*0.25+57.9=42.1*0.75+57.9*(1-0.25)=42.1*0.75+57.9*0.75=100*0.75=75
42.1×0.75-0.579×25+57.9用简便算法怎么算如题
1.25×5分之3+0.75×0.6-60%
简算[0.75×42.7-0.573×25+57.3]÷3×760
2.15+(-4.25)+(-0.75)+(-二十分之三)
化简下列各数 -(-68) -(+0.75)-(-5分之3)-(+3.8)
8×75%-3÷3/4 8.5×0.75+7.5×75% 5/8-5/6×(1/4-25%)能简算要简算8×75%-3÷3/4 8.5×0.75+7.5×75% 5/8-5/6×(1/4-25%)能简算要简算
- |- 0.25 |+(+4分之3)-(-0.125)+|-0.75|
5/12+X=0.75 X-(1/6+3/8)=5/12
25+(7x-5)=58-(5x+14)
x+0.75-3/5=0.15这方程怎解
-0.125-13.1+25又5分之3-5又8分之7-25 .6
求下列几道解方程1.4X-1.6×5=1.812÷(0.5X-1)=69x3-1.7X=13.41.8÷(X-0.3)=0.6(X-0.75)÷1.5=76x(X-)=160%X+25=40
化简下列各数 -(-68),-(+0.75),-(+3.8)
(+15又5分之3)(-0.75)(-3又9分之5)(-13之5)
(-2/3)+(-1/6)= (-5/4)+1.25=
(0.125)+(-0.75)+(-3/4)+1/8+1
速算与巧算![26×(6-2.5)÷0.5-25]×0.2 1993×20002000-2000×1993199379.31×0.6783×0.25+23.56+6.783×7.931×0.75-0.125×0.7931×67.83×8987×19861986-1986×19871987 6.8×0.32+0.32×4.2-8÷2528.67×67+3.2×286.7+573.4×0.
此题能这样解:1+2-3+4-5+6-…-98+99=(99-98+97-96)+(95-94+93-92)+……+(7-6+5-4)+(3-2+1-0)=2×25=50