10 : 2/3 * 1 1/2 = 10 * 3/2 * 3/2= 15*3/2= 45/2=22 1/2
b) 12 * 2 3/4 : 2 3/4 = 12 * 11/4 : 11/4 = 33 : 11/4 = 33 * 4/11= 12
c) 4 1/2 : 1 1/2 - 1 3/4 = 9/2:3/2- 1 3/4 = 9:3/2:2 - 1 3/4 = 3/1 - 1 3/4= 3 - 1 3/4= 2 4/4- 1 3/4 = 1 1/4
d) 20 - 6 3/4 : 4 1/2 = 20-27/4 : 9/2= 20 - 27/4 * 2/9= 20 - 3/2= 20 - 1 1/2= 19 2/2 - 1 1/2= 18 1/2
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10 : 2/3 * 1 1/2 = 10 * 3/2 * 3/2= 15*3/2= 45/2=22 1/2
b) 12 * 2 3/4 : 2 3/4 = 12 * 11/4 : 11/4 = 33 : 11/4 = 33 * 4/11= 12
c) 4 1/2 : 1 1/2 - 1 3/4 = 9/2:3/2- 1 3/4 = 9:3/2:2 - 1 3/4 = 3/1 - 1 3/4= 3 - 1 3/4= 2 4/4- 1 3/4 = 1 1/4
d) 20 - 6 3/4 : 4 1/2 = 20-27/4 : 9/2= 20 - 27/4 * 2/9= 20 - 3/2= 20 - 1 1/2= 19 2/2 - 1 1/2= 18 1/2