7.5x2.5+3.6简便计算

冷庙群11447.5x+3.6=18的方程怎么解 -
郝乐临13776695523 ______ 7.5x+3.6=187.5x=18-3.67.5x=14.4 x=14.4÷7.5 x=1.92

冷庙群11442.5x2.7 7.5x2.5用简便计算怎么做 -
郝乐临13776695523 ______ 2.5x2.7+7.5x2.5 =2.5x(2.7+7.5) =2.5x10.2 =2.5*10+2.5*0.2 =25+0.5 =25.5

冷庙群11442.5*3.6的简便算法 -
郝乐临13776695523 ______ 2.5x3.6 =(2+0.5)x(3+0.6) =2x3+0.5x0.6 =6+3 =9

冷庙群11442.5*3.6用简便算法怎样算? -
郝乐临13776695523 ______ 原式=2.5x(4x0.9)=(2.5x4)x0.9=10x0.9=9 供参考.

冷庙群1144简便计算 7.5*3/5+2.5÷5/3 2/9÷[5/6*( -
郝乐临13776695523 ______ 1. 7.5X(3/5)+2.5除以(5/3) =7.5X(3/5)+2.5X(3/5) =(7.5+2.5)X(3/5) =10X(3/5) =6. 2. (2/9)除以[(5/6)X(4/5-2/3)] 解: 因为 [(5/6)X(4/5-2/3)]除以(2/9) =[(5/6)X(4/5-2/3)]X(9/2) =(9/2)X(5/6)X(4/5)-(9/2)X(5/6)X(2/3) =3-5/2 =1/2 所以 (2/9)除以[(5/6)X(4/5-2/3)]=2.

冷庙群11442.05÷0.82+33.6的简便运算 -
郝乐临13776695523 ______ 2.05÷0.82+33.6的简便运算: 2.05÷0.82+33.6 =(0.41*5)/(0.41*2)+33.6 =5/2+33.6 =2.5+33.6 =36.1 扩展资料 简算方法: 利用公式法 1、加法: 交换律,a+b=b+a 结合律,(a+b)+c=a+(b+c) 2、减法运算性质: a-(b+c)=a-b-c, a-(b-c)=a-b+c a-...

冷庙群11448.4x2.5+7.5x1.2的答案 -
郝乐临13776695523 ______ =21+9=30

冷庙群11447.5x2.3+1.1x2.5十1.25x0.4 -
郝乐临13776695523 ______ 7.5x2.3+1.1x2.5十1.25x0.4=2.5x6.9+1.1x2.5+0.5=2.5x(6.9+1.1)+0.5=2.5x8+0.5=10+0.5=10.5

冷庙群11447.5X2.3+1.9X2.5+12.5X0.4的简便什么做?请帮忙 -
郝乐临13776695523 ______ 7.5x2.3+1.9x2.5+12.5+0.4=7.5x(1.9+0.4)+1.9x2.5+12.5x0.4 =7.5x1.9+1.9x2.5+7.5x0.4+12.5x0.4=1.9x(7.5+2.5)+0.4x(7.5+12.5)=1.9x10+0.4x20=19+8=27 关键就是把2.3拆成1.9+0.4,因为后面出现了这两个因数

冷庙群1144小数或整数的简便计算题,共需125题(四年级的) -
郝乐临13776695523 ______ 简便计算 ① 5.4*0.75÷1.5② 270÷4.5③ 3.4*0.46+3.4*0.54 ④ 25.5÷〔(10-8.98)*2.5〕⑤ 2.5*(6.2-2.6)*0.4 ⑥ 12.6-(2.89+7.11)*1.01⑦ 6.3+4.82...