Pomóżcie mi z rozwiązać te zadania ...* to razy
(3/8+5/6) :2/3=
(4/5-3/4)* 2 1/2=
9/20 :3/4 +6/7=
12/15 +8/10 :2/5 =
4/7 *2 -4/21 :2 =
9/11* 3/5 + 8/9 :2/3=
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1. (3/8+5/6) :2/3= (9/24 + 20/24) : 2/3 = 29/24 : 2/3 = 29/24 * 3/2 = 29/16 = 1 cała i 13/16
2. (4/5-3/4)* 2 1/2 = (16/20 + 15/20) * 5/2 = 31/20 * 5/2 = 31/8 = 3 7/8
3. 9/20 :3/4 +6/7= 9/20 : 14/20 + 6/7 = 9/20 * 20/15 + 6/7 = 21/35 +30/35 = 51/35 = 1 16/35
4. 12/15 +8/10 :2/5 = 12/15 +8/10 : 4/10 = 12/15 + 8/10 * 10/4 = 12/15 +2 = 2 12/15 = 2 4/5
5. 4/7 *2 -4/21 :2 = 8/7 - 4/21 * 1/2 = 8/7 - 2/21 = 24/21 - 2/21 = 22/21 = 1 1/21
6. 9/11* 3/5 + 8/9 :2/3= 27/55 + 8/9 * 3/2 = 81/165 + 220/165 = 301/165 = 1 146/165