Question

ă. Clasa a V-a 12. Calculaţi: 317 4 12 6 a) 3- 8 d) 3. 2 3 4 1 20 5 4 9 4 b) 2- 24 3 4 e) 2. 5 3 c) 2- 7 30 1) 3½-2 51 6 5 2 a 3 25

va rog din tot sufletul dau coroana !!!!

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Answer 1

Răspuns:

Explicație pas cu pas:

Introduci intregii in fractie si aduci la acelasi numitor

a)

3 3/4 - 1/12 - 7/6 = 15/4 - 1/12 - 7/6 = 45/12 - 1/12 - 14/12 = 30/12 = 5/2

b)

2 9/20 - 4/5 - 1/4 = 49/20 - 4/5 - 1/4 = 49/20 - 16/20 - 5/20 = 28/20 = 7/5

c)

2 7/30 - 5/6 - 1/5 = 67/30 - 5/6 - 1/5 = 67/30 - 25/30 - 6/30 = 36/30 = 6/5

d)

3 8/9 - 2 2/3 - 1/4 = 35/9 - 8/3 - 1/4 = 140/36 - 96/36 - 9/36 = 35/36

e)

2 2/5 - 4/3 - 3/4 = 12/5 - 4/3 - 3/4 = 144/60 - 80/60 - 45/60 = 19/60

f)

3 1/5 - 2 2/3 - 3/25 = 16/5 - 8/3 - 3/25 = 240/75 - 200/75 - 9/75 = 31/75