Question

Өсу ретімен жазыныз 2/5,1/3,5/6,1 2/3,7/5,3 6/6.Амалдарды орынданыз:а)3/16+7/16;17/25-5/25:б)6/18+11/12;19/24-7/36:в)4 7/12+7 3/4;13 7/8-6 3/5: ​

Answer 1

Ответ:

1) 6/25 : 9/5 = 6/25 * 5/9 = (6 * 5)/(25 * 9) = (3 * 2 * 5)/(5 * 5 * 3 * 3) = 2/(5 * 3) = 2/15;

2) 8/27 : 8/9 = 8/27 * 9/8 = (8 * 9)/(27 * 8) = (8 * 9)/(9 * 3 * 8) = 1/3;

3) 9 5/7 : 1 23/28 = (9 * 7 + 5)/7 : (1 * 28 + 23)/28 = 68/7 : 51/28 = 68/7 * 28/51 = (4 * 17 * 7 * 4)/(7 * 17 * 3) = 16/3 = 5 1/3;

4) 6 2/3 : 1 1/8 = 20/3 : 9/8 = 20/3 * 8/9 = (20 * 8)/(3 * 9) = 160/27 = 5 25/27;

5) 57 : 19/24 = 57 * 24/19 = (3 * 19 * 24)/19 = 72;

6) 36/47 : 18 = 36/47 * 1/18 = (2 * 18)/(47 * 18) = 2/47.

Answer 2

Амалдарды орындау үшін біз сан жолдықтай бірдей жасаймыз:

а) 3/16 + 7/16 = (3 + 7) / 16 = 10/16 = 5/8

17/25 - 5/25 = (17 - 5) / 25 = 12/25

5/8 ÷ 12/25 = 5/8 * 25/12 = 125/96

б) 6/18 + 11/12 = (6/18) * (2/2) + 11/12 = 12/36 + 11/12 = 12/36 + 33/36 = (12 + 33) / 36 = 45/36 = 15/12 = 5/4

19/24 - 7/36 = 38/48 - 7/36 = (38/48) * (3/3) - 7/36 = 114/144 - 7/36 = (114 - 28) / 144 = 86/144 = 43/72

5/4 ÷ 43/72 = 5/4 * 72/43 = 90/43

в) 4 7/12 + 7 3/4 = 4 + 7 + 7/12 + 3/4 = 11 + 7/12 + 3/4 = 11 + 21/12 + 9/12 = 11 + (21 + 9) / 12 = 11 + 30/12 = 11 + 5/2 = 27/2

13 7/8 - 6 3/5 = 13 - 6 + 7/8 - 3/5 = 7 + 7/8 - 3/5 = 7 + (7/8 * 5/5) - (3/5 * 8/8) = 7 + 35/40 - 24/40 = 7 + (35 - 24) / 40 = 7 + 11/40

27/2 ÷ 11/40 = 27/2 * 40/11 = 540/22 = 270/11

Сізге анықтамалық сұрауларыңыз болса, жазыңыз.