Пошаговое объяснение:
А
1) (2 1/2)² = 2 1/2 * 2 1/2 = 5/2 * 5/2 = 25/4
2) 1 1/2 + 2 2/3 = 1 3/6 + 2 4/6 = 3 7/6 = 4 1/6
3) 25/4 : 4 1/6 = 25/4 : 25/6 = 25/4 * 6/25 = 1/2 * 3/1 = 3/2 = 1 1/2
4) 1 1/2 + 38 1/2 = 39 2/2 = 40
Б
1) 7 2/3 - 6 3/4 = 7 8/12 - 6 9/12 = 6 20/12 - 6 9/12 = 11/12
2) 11/12 * 24/25 = 11/1 * 2/25 = 22/25
3) 22/25 + 3,12 = 22/25 + 3 12/100 = 22/25 + 3 3/25 = 3 25/25 = 4
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Answers & Comments
Б) 4
На фото розписала вирішення:
Пошаговое объяснение:
А
1) (2 1/2)² = 2 1/2 * 2 1/2 = 5/2 * 5/2 = 25/4
2) 1 1/2 + 2 2/3 = 1 3/6 + 2 4/6 = 3 7/6 = 4 1/6
3) 25/4 : 4 1/6 = 25/4 : 25/6 = 25/4 * 6/25 = 1/2 * 3/1 = 3/2 = 1 1/2
4) 1 1/2 + 38 1/2 = 39 2/2 = 40
Б
1) 7 2/3 - 6 3/4 = 7 8/12 - 6 9/12 = 6 20/12 - 6 9/12 = 11/12
2) 11/12 * 24/25 = 11/1 * 2/25 = 22/25
3) 22/25 + 3,12 = 22/25 + 3 12/100 = 22/25 + 3 3/25 = 3 25/25 = 4