6 [1/12] - X = 4 [1/4]

1) 12*4 ⅝=12* 37/8=111 /2=55½   2) 32* 4⅚= 31 6/6 - 4⅚=27⅙ 3) 14⅖ - ⅗ = 13 7/5 - ⅗ = 13⅘   4) 4 7/9 - 2 11/12 = 4 28/36 - 2 33/36 = 3  64/36 - 2 33/36 = 1 31/36 5) 5+7 8/9 + 4½ = 12 8/9 + 4½ = 12 16/18 + 4 9/18 = 16 25/18=17 7/18   6) 1 1/10 + 5 ⅘= 1 1/10 + 5 8/10 = 6 9/10   7) ¼ + ⅕ = 5/20 + 4/20 = 9/20   8) 2⅚ + 3 ⅙ = 5 6/6 = 6 9) 1⅔*3/7 = 5/3 * 3/7 = 5/7 10)2⅔ * 3 ¾ = 8/3 * 15/4 = 10

6 1/12-x 4   1/4 6  1/12-4  1/4=x 6  1/12-4  3/12=x 5  13/12-4  3/12=x 1  10/12=x 1  5/6=x x=1  5/6