3 3/4 - 1 1/4 =2 2/4=2 1/2
1 5/6 - 1 1/6=4/6=2/3
<span>4 5/9 - 3 2/9 =1 3/9=1 1/3</span>
<span>5 11/12 - 1 5/12=4 6/12=4 1/2</span>
<span>75+5= 70 + ( 5 + 5) = 70 + 10 = 80
75+6= 70 + ( 5 + 6 ) = 70 + 11 = 81
75+7= 70 + (5 + 7 ) = 70 + 12 = 82
75+8= 70 + ( 5 + 8 ) = 70 + 13 = 83
75+9= 70 + ( 5 + 9 ) = 70 + 14 = 84</span>
101: 10=10, 1
36: 5=7, 1
64: 7=9, 1
85: 9=9, 4
77: 9=8, 5. и т. д. (Я думаю дальше понятно)
<span>а) 2/9<5/9
б) 7/18<7/11</span>