Question

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1. 1/9 + 2/3=
2. 1/2 x 4/9 + 2/5=
3. 3/4 x 1/6 + 5/8=
4. 1/5 : ( 1/4) la puterea 2 =
5. 2/3+ 1/8 x 1/9
6. 3/5 x ( 1/5 + 4/5)
7. 1/8 : 1/5 + 1/2
8. (1/2 + 3/5) : 2/9
9. 1/6 - 1/9 x 5/8

Answer 1

Răspuns:

1.  se aduce la acelasi numitor, inmultesti a doua fractie cu 3

(1 +2*3)/9= 7/9

2.  1*4/ 2*9 + 2/5= 2/9+2/5  = (2*5+ 2*9)/5*9=    se aduce la acelasi numitor 40

(10+18)/40= 28/40= 7/10    (se simplifica adica se imparte prin 4 fiecare termen

3.  3/24 +5/8= 1/8+ 5/8= 6/8= 3/4 ( se simplifica prin 2)

4. 1/5 : 1/16 =16/5

5. 2/3+ 1/72= (2*24 +1)/72= 49/72

6.   3/5 x5/5= 3/5x1= 3/5

7. 1/8 x5/1 +1/2 = 5/8 +1/2 = (5+ 4)/8= 9/8