(6.9-3.15)÷0.3×0.8 2.5×(1.9+1.9+1.9+1.9)简便计算要怎么算啊

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(6.9-3.15)÷0.3×0.8 2.5×(1.9+1.9+1.9+1.9)简便计算要怎么算啊
(6.9-3.15)÷0.3×0.8 2.5×(1.9+1.9+1.9+1.9)简便计算要怎么算啊

(6.9-3.15)÷0.3×0.8 2.5×(1.9+1.9+1.9+1.9)简便计算要怎么算啊
(6.9-3.15)÷0.3×0.8
=6.9 ÷0.3×0.8-3.15÷0.3×0.8
=18.4-8.4
=10
2.5×(1.9+1.9+1.9+1.9)
=2.5×4×1.9
=10×1.9
=19

(6.9-3.15)÷0.3×0.8 2.5×(1.9+1.9+1.9+1.9)简便计算要怎么算啊 (6.9减3.15)除以0.3乘0.8= 脱式计算,要算式要结果.第一个采纳. 3.2÷0.01= 6.8-10.8= 51×39≈ 1÷ ×3= 8×125%= 7.2+8= 10.8÷1.08×0= (0.25+ )÷10=3/7-3/5+4/7+0.4 (6.9-3.15)÷0.3×0.8 2.5×(1.9+1.9+1.9+1.9) 3、 解方程或解比例(6分)2Ⅹ+2.7=24.7 Ⅹ&sh (0.8x+0.9)÷0.5=(x+5)÷2+(0.3x-0.2)÷0.3 3.15÷1.25×0.8简便计算怎么算 12:60.14:2.5 比值 x:2.5=0.8 6.9:x=0.312:60.14:2.5 比值 x:2.5=0.8 6.9:x=0.3 5/6:x=3/2 未知项 66.6666÷12.5÷3.7÷0.8÷0.3 6.9÷(x-7)=2,3 (14.8+x-9.2)÷4=6.9(38.5-x-4.5)÷0.8=16 (0.8x+0.9)÷0.5=(x+5)÷2+(0.3x-0.2)÷0.3运用去分母的方法解方程, 0.3÷0.54=0.8÷x 今晚要! 6.9÷0.3×15.2简便算怎么算(脱式计算) 解方程,3分之2x-5分之1x=0 x÷(1-5分之2)=36 3分之16x-4=60 3x+30%x=33.3 6.9÷60%x=0.3 7/8×(3/4-0.3÷0.8)简便计算 1.(5.75-4.75)/[2.5+(0.75*1.25*8) 2.(6.9*3.6*3.5)/(1.25/0.25) 3.15.37*7.89-9.37*7.89+15.37*2.11-9.37*2.11-9.37*2.11 4.10-9.8+9.6-9.4+9.2-9.+0.8-0.6+0.4-0.2 5.2000+1999-1998-1997+1996+1995-1994-1993+.+4+4-2-1 6.(44332-443.32)/(88664-8 请计算下面各题.能简算的要筒算.0.96÷4÷2.5 10.1×8.7 6.9÷0.3×15.2请计算下面各题.能简算的要筒算.0.96÷4÷2.510.1×8.76.9÷0.3×15.2 1、1.25×1.25.×0.8×0.820个1.25 21个0.82、0.1+0.2-0.3-0.4+0.5+0.5-0.7-0.8.-199.2+199.33、1÷(2÷3)÷(3÷4)÷(4÷5).÷(2007÷2008) 简算(列综合算式)符号用所提供的加(+)减(-)乘(×)除(÷)等于(=)(1)5/4(四分之五)×4+4×1/4(四分之一)(2)7.31-3.15-0.16(3)21.6-0.8×4÷0.8×44/5×4+4×1/4