вычислите представив десятичную дробь в виде обыкновенной 1)4.8-2 3/4 2)9 1/7-5,8 3)15 3/8-7,25 4)81 2/3-63,5 5)12,36-7 13/20 6)6,4-2 1/15 7)5,7-3 1/4 8)6,4-2 1/9
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2)9 1/7 - 5 4/5= 9 5/35 - 5 28/35= 4 -23/35= 3 2/35
3)15 3/8 - 7 1/4 = 15 3/8 - 7 2/8= 8 1/8 (8,125)
4)81 2/3 - 63 1/2 = 81 4/6 - 63 3/6 = 18 1/6
5)12 36/100 - 7 13/20 = 12 36/100 - 7 65/100 = 6 -29/100 = 5 71/100
6)6 2/5 - 2 1/15 = 6 6/15 - 2 1/15 = 4 5/15= 4 1/3
7)5 7/10 - 3 1/4 = 5 14/20 - 3 5/20 = 2 9/20 ( 2,45)
8)6 2/5 - 2 1/9 = 6 18/45 - 2 5/45 = 4 13/45