307. выполните действия:
1) 7 1/3 - 1/5 - 1 1/15 =;
2) 3 7/8 - 1 1/4 - 1/2 =;
3) 4 7/9 - 1 2/3 + 1/6 = :
помогите пожалуйста ((0(
1) 7 1/3 - 1/5 - 1 1/15 =;
2) 3 7/8 - 1 1/4 - 1/2 =;
3) 4 7/9 - 1 2/3 + 1/6 = :
помогите пожалуйста ((0(
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Ответ:
1) 7 1/3 - 1/5 - 1 1/15 = 22/3 - 1/5 - 16/15= 110/15 - 3/15 - 16/15 = 91/15 = 6 1/15
2) 3 7/8 - 1 1/4 - 1/2 = 31/8 - 5/4 - 1/2 = 31/8 - 10/8 - 4/8 = 17/8 = 2 1/8
3) 4 7/9 - 1 2/3 + 1/6 = 43/9 - 5/3 + 1/6 = 86/18 - 30/18 - 3/18 = 53/18 = 2 17/18