Найдите значение выражения
1. а-(9 3/50-5 7/25)при а=7 1/2
2. (20 1/5-b)-6 1/3 при b= 11 2/15
1. а-(9 3/50-5 7/25)при а=7 1/2
2. (20 1/5-b)-6 1/3 при b= 11 2/15
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1. 7 1/2 - (9 3/50 - 5 7/25) = 3 18/251) 9 3/50 - 5 7/25 = 9 3/50 - 5 14/50 = 8 53/50 - 5 14/50 = 3 39/50
2) 7 1/2 - 3 39/50 = 7 25/50 - 3 39/50 = 6 75/50 - 3 39/50 = 3 36/50 = 3 18/25
2. (20 1/5 - 11 2/15) - 6 1/3 = 2 11/15
1) 20 1/5 - 11 2/15 = 20 3/15 - 11 2/15 = 9 1/15
2) 9 1/15 - 6 1/3 = 9 1/15 - 6 5/15 = 8 16/15 - 6 5/15 = 2 11/15