Представьте в виде десятичной дроби числа: 3 1/2; 1 1/4; 2 1/5; 7 1/20.
3 1/2 = , 1/2(*50 = 3 50/100= 3,50
1 1/4 = 1 1/4 (*20 = 1 20/100 = 1,20
2 1/5 = 2 1/5 (*20 = 2 20/100= 2,20
7 1/20 = 7 1 /20(5 = 7 5/100 = 7,05
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3 1/2 = , 1/2(*50 = 3 50/100= 3,50
1 1/4 = 1 1/4 (*20 = 1 20/100 = 1,20
2 1/5 = 2 1/5 (*20 = 2 20/100= 2,20
7 1/20 = 7 1 /20(5 = 7 5/100 = 7,05