124×1.2+36.2×12+504×1.2+12
= 124×1.2+504×1.2+10x 1.2 +362×1.2
= 1.2 x( 124 + 504 + 10 + 362 )
= 1.2 x 1000
= 1200
简便计算124×1.2+36.2×12+504×1.2+12
124×1.2+36.2×12+504×1.2+12
= 124×1.2+504×1.2+10x 1.2 +362×1.2
= 1.2 x( 124 + 504 + 10 + 362 )
= 1.2 x 1000
= 1200