3.4+6.6x2.1简便计算

奚享史24873.4x7x1.5的简便计算 -
冯呼晓13626683201 ______ (3.4*1+3.4*0.5)*7=(3.4+1.7)*7=5.1*7=35.1

奚享史248710.47—3.4+6.6简便运算 -
冯呼晓13626683201 ______ 10.47—3.4—6.6 是 —6.6 吧=10.47—(3.4+6.6)=10.47-10=0.47

奚享史24873.4,*12.5+6.6*12.5简算题 -
冯呼晓13626683201 ______ (3.4+6.6)*12.5

奚享史24873.4乘15加13乘3.4加28乘6.6用简便方法 -
冯呼晓13626683201 ______ 3.4乘15加13乘3.4加28乘6.6用简便方法=3.4x(15+13)+28x6.6=28x(3.4+6.6)=28x10=280

奚享史2487简便运算4.4*2.08+66x208 - 2.08 -
冯呼晓13626683201 ______ 简便运算4.4*2.08+6.6x2.08-2.082.08*(4.4+6.6-1)=2.08*10=20.8

奚享史24873.4*7*1.简便算法 -
冯呼晓13626683201 ______ 3.4*7*1.5 =3.4*(7*1.5) =3.4*10.5 =3.4*(10+0.5) =3.4*10+3.4*0.5 =34+1.7 =35.7

奚享史248715.6x3.4+1.56x66简便法怎么做 -
冯呼晓13626683201 ______ 15.6x3.4+1.56x66=1.56x34+1.56x66=1.56x(34+66)=1.56x100=156

奚享史24874.6*3.4+4.6*6.6简便方法 -
冯呼晓13626683201 ______ 4.6*3.4+4.6*6.6 =4.6*(3.4+6.6) =4.6*10 =46

奚享史2487简便计算3.3x3.4+3.4x3.5+3.5x3.6+3.6x3.7简便计算1 .3.3x3.4+3.4x3.5+3.5x3.6+3.6x3.7 2.1/21+1/30+1/42+1/56+1/72+1/90 3.19/24x85+109x5/24 -
冯呼晓13626683201 ______[答案] 1 3.3x3.4+3.4x3.5+3.5x3.6+3.6x3.7= 2. 1/21+1/30+1/42+1/56+1/72+1/90 =1/21+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10 =1/21+1/5-1/10=1/21+1/10=31/210 3.19/24x85+109x5/24 =

奚享史2487小学五年级简便计算题急······· -
冯呼晓13626683201 ______ (a+b)+ c = a +(b+c)1. 2.73 + 0.89 + 1.272. 4.37 + 0.28 + 1.63 + 5.72 a-b-c = a -(b+c)1. 10 - 0.432 - 2.5682. 9.3 - 5.26 - 2.743. 13.4...