3 1/9 : 2 1/3 -2 5/6= - 1 1/2
1) 3 1/9 : 2 1/3 = 28/9 * 3/7 = 4/3 = 1 1/3
2)1 1/3 - 2 5/6 = - (2 5/6 - 1 1/3 )= - (2 5/6 - 1 2/6)= - 1 3/6 = - 1 1/2
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10 16/17:8 5/11 + 1 2/3 = 2 49/51
1) 10 16/17 : 8 5/11= 186/17 * 11/93 = 22/17 = 1 5/17
2) 1 5/17 +1 2/3 =1 15/51 +1 34/51 = 2 49/51