3.4x71.5的简便运算

仇饶券36153.4x7x1.5的简便计算(递等式计算,是简便计算!)急急急!! -
刘士莲13634004252 ______ 3.4x7x1.5 =17/5x5x0.3x7 =17x2.1 =(20-3)x(2+0.1) =40+2-6-0.3 =36-0.3 =35.7

仇饶券36153.4x7x1.5的简便运算 -
刘士莲13634004252 ______ =3.4*1.5*7=5.1*7=35.7

仇饶券36153.4x7x1.5的简便运算怎么算 -
刘士莲13634004252 ______ 3.4x7x1.5=(3+0.4)*(1+0.5)*7=(3+0.4+1.5+0.2)*7=5.1*7=35.7

仇饶券36153.4x7x1.5的简便或其他法方 -
刘士莲13634004252 ______ 3.4x7x1.5=3.4x7x3/2=1.7x7x3=1.7x21=1.7x(20+1)=1.7x20=1.7=34+1.7=35.7

仇饶券36153.4x7x1.5脱式计算 -
刘士莲13634004252 ______ 3.4X7X1.5 =3.4X10.5 =3.4X10+3.4X0.5 =34+1.7 =35.7

仇饶券36153.4*7*1.5的简便运算 -
刘士莲13634004252 ______ 3.4x7x1.5; =(3+0.4)x7x(1+0.5); =(21+2.8)x(1+0.5); =23.8x(1+0.5); =23.8+0.5; =24.3

仇饶券36153.4*7*1.简便算法 -
刘士莲13634004252 ______ 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

仇饶券36153.4乘以10.5简便的运算 -
刘士莲13634004252 ______ 3.4x10.5=3.4x(10+0.5)=34+1.7=35.7

仇饶券36153.4乘7乘1.5简便计算
刘士莲13634004252 ______ 3.4*7*1.5=1.7*2*7*1.5=1.7*7*(2*1.5)=1.7*(7*3)=1.7*21=35.7

仇饶券36153.4x7 - 1.5简便方法 -
刘士莲13634004252 ______[答案] 3.4*7-1.5=(1.5+1.9)*7-1.5=1.5*(7-1)+1.9*7=9+13.3=22.3