56一(12+13)等於多少?

56一(12+13)等於多少?使用者89762208750082020-03-31 20:38:06

解:5/6-1/2+1/3等於( 2/3 )

∵已知需求出5/6-1/2+1/3等於多少

∴5/6 - 1/2 + 1/3

= 5/6 - (1×3)/(2×3)+ (1×2)/(3×2)

= 5/6 - 3/6 + 2/6

= 2/6 + 2/6

= 4/6

= 2/3

答:5/6-1/2+1/3等於2/3