1.8×0.25-0.25

0.25×1.8+3.9(简算0.25×1.8+3.9=0.3*(0.25*6+1.3)=0.3*(1.5+1.3)=0.3*2.8=0.3*(3-0.2)=0.9-0.06=0.84

5.8*四分之一-1.8*0.255.8*四分之一-1.8*0.25=0.25*(5.8-1.8)=0.25*4=15.8×4分之1-1.8×0.25=5.8×0.25-1.8×0.25=(5.8-1.8)×0.25=4×0.25=1

1.8/0.25巧算1.8/0.25=（1.8×4）÷（0.25×4）=7.2÷1=7.2原式＝1.8×4=7.21.8/0.25=1.8÷(1/4)=1.8×4=7.2

1.8/0.25求巧算急1.8/0.25=(1.8x4)/(0.25x4)=7.2/1=7.21.8/0.25=1.8/(1/4)=1.8*4=7.21.8/0.25=1.8×4=7.2

简便计算：0.25×3.2-0.25+1.8×25%原式=0.25×（3.2+1.8-1）=0.25×4=10.25×（3.2-1+1.8）=10.25×3.2-0.25+1.8×0.250.25(3.2-1+1.8)0.25*410.00

0.25X3.2－0.25+1.8X25％简算0.25X3.2－0.25+1.8X25％简算把各个数都转换成分母为100的分数能简算0.25X3.2－0.25+1.8X25％=0.25x(3.2-1+1.8)=0.25x4=1如果满意，记得

0.25:0.25:1/20=5:1

3.75+0.25*1.8简便计算3.75+0.25*1.8=3.7+0.25*0.2+.025*1.8=3.7+0.25*(0.2+1.8)=3.7+0.25*2=4.2

0.75/0.25*1.8简便运算?这还要简便运算吗0.75/0.25=33*1.8=5.4

1.8÷0.25＋2.2×0.25简便算法求求你(2-0.2)/0.25+(2+0.2)*0.25=(2-0.2)*4+(2+0.2)/4=2x4-0.2x4+2/4+0.2/4=8-0.8+0.5+0.05=8-0.25=7.75

1.8除以0.25怎么简便计算急!1.8/0.25=1.8/(1/4)=1.8*4=7.2相当于1.8\(1/4)=1.8*4=7.21.8*4=2*4-0.2*4=8-0.8=7.21.8/0.25=1.8*4=1*4+0.8*4=7.2

1.8除以0.25怎么巧算1.8÷0.25=（1.8×4）÷（0.25×4）=7.2÷1=7.2

18.8/[(1.8+0.7)/0.25]简便计算18.8/[(1.8+0.7)/0.25]=18.8/(2.5/0.25）=18.8/10=1.88

0.25*1.8*4的简便方法0.25*1.8*4=0.25*4*1.8=1*1.8=1.8

1.8/0.25的竖式的方法1.8÷0.25＝7.2它的竖式,首先要将除数变成没有小数点的形式,即将被除数与除数同时扩大100倍,即计算  180÷25＝7.2

1.8÷0.25验算并列竖式1.8÷0.25=7.27.2______25)180175_______5050_______0

（1.8加1.8加1.8加1.8）乘0.25怎么简便计算 

0.250.250.250.25等于0.1250.25*0.25/(0.25+0.25)

纸厚0.25毫米,卷成圆柱体,外径1.8米,内经0.25米,求纸展开有多长首先计算圈数N=（1.8-0.25）X1000/（0.25X2）=3100圆周率pi取3.14159第一圈周长A1=250pi第二圈周长A2=（250+0.5）pi=

0.25×8.19-0.25×4.190.25×8.19-0.25×4.19=0.25×（8.19-4.19）=0.25×4=1所以答案是1=【8.19-4.19】×0.25=4×0.25=10.25×8.19-0.25×4.19=0.25