2/3+1/4 , 4/5-3/4 , 1/2+2/5 , 1/2-2/5 , 3/4+2/3 - вопрос №64701692314453412251225342335133513 от adilete840 27.02.2021 21:02

Question

Математика: 2/3+1/4 , 4/5-3/4 , 1/2+2/5 , 1/2-2/5 , 3/4+2/3 , 3/5-1/3 , 3/5+1/3 решите

adilete840 · Answer

1). 11/12
2/3 = 8/12; 1/4 = 3/12 ⇒ 8/12 + 3/12 = 11/12
2). 1/20 или 0,05
4/5 = 16/20; 3/4 = 15/20 ⇒ 16/20 - 15/20 = 1/20 или 0,05
3). 9/10 или 0,9
1/2 = 5/10; 2/5 = 4/10 ⇒ 5/10+4/10 = 9/10 или 0,9
4). 1/10 или 0,1
1/2 = 5/10; 2/5 = 4/10 ⇒ 5/10 - 4/10 = 1/10 или 0,1
5). 1 и 5/12
3/4 = 9/12; 2/3 = 8/12 ⇒ 9/12 + 8/12 = 17/12 = 1 и 5/12
6). 4/15
3/5 = 9/15; 1/3 = 5/15 ⇒ 9/15 - 5/15 = 4/15
7). 14/15
3/5 = 9/15; 1/3 = 5/15 ⇒ 9/15 + 5/15 = 14/15