（5十0.2）X（10十0.1）=50十0.5十2十0.02二52.52

5.2乘10.1 =5.2x(10+0.1) =5.2x10+5.2x0.1 =52+0.52 =52.52

5.2x10.1 =5.2x10+5.2x0.1 =52+0.52 =52.52

5.2×10.1 =5.2×(10+0.1) =52+0.52 =52.52

五点2×10点一怎么列递等式计算要简便 5.2×10.1 =5.2×10+5.2×0.1 =52+0.52 =52.52

5分之3+10分之1-5分之2 =5分之3-5分之2+10分之1 =5分之1+10分之1 =10分之2+10分之1 =10分之3

29.5×10.1-2.95=29.5×(10+0.1)-2.95=29.5×10+29.5×0.1-2.95=295+2.95-2.95=295

原式=101×0.52-0.52×1 =0.52×（101-1） =0.52×100 =52

( 1/10 + 3/5 )( 2/9 - 2/15 ) = 1/5 X ( 1/2 + 3 )( 1/3 - 1/5 ) X 2/3 = ( 1/3 + 2 )( 1/15 - 1/25 ) = ( 1/3 + 6/3 )( 5/75 - 3/75 ) = 7/3 X 2/75 = 21 / 225 ( 10/1 + 5/3 )( 9/2 - 15/2 ) = 5 X ( 2 + 1/3 )( 3 - 5 ) X 3/2 = 15/2 X 7/3 ...

2.25乘10.1简便运算 =2.25x(10+0.1) =2.25x10+2.25x0.1 =22.5+0.225 =22.725