Question

10. Calculeaza, efectuând mai întâi exercitiile din paranteze. a) 3x (4:2) = b) (3 x 4): 2 c) 5x (4 + 7) = d) (5 x 4) + (5 x 7) = e) 7 x (6-3) = f) (7 x 6) -(7 x 3) = 8) (35 + 12) +6:3= h) 38+ (12 + 40: 8) = 1) (99-35) + 24 + 6 x 6 = i) 27 +27:9+ (20:4:5+ 12) = k) 28 + (7 x 6 - 24:6) + 14 = 1) 33-3+ (16:4:2 x 9 +11) = m) 25+ (11 + 7 x 7) + (25 - 3 x 6) = n) 56:7: 2 + (40:5:4:2 + 3) =​

Answer 1

Răspuns:

a) 3 × ( 4 : 2 ) = 6

3 × 2 = 6

b ) ( 3 × 4 ) : 2 = 6

12 : 2 = 6

c) 5 × ( 4 + 7 ) = 55

5 × 11 = 55

d) ( 5× 4 ) + ( 5 × 7 ) = 55

20 + 35 = 55

e) 7 × ( 6 - 3 ) = 21

7 × 3 = 21

f) ( 7 × 6 ) - ( 7 × 3 ) = 21

42 - 21 = 21

g) ( 35 + 12 ) + 6 : 3 = 49

47 + 2 = 49

h) 38 + ( 12 + 40 : 8 ) = 55

38 + ( 12 + 5 ) =

38 + 17 = 55

i ) 27 + 27 : 9 + ( 20 : 4 : 5 + 12 ) = 43

27 + 27 : 9 + ( 5 : 5 + 12 ) =

27 + 27 : 9 + ( 1 + 12 ) =

27 + 27 : 9 + 13 =

27 + 3 + 13 =

30 + 13 = 43

Așa faci și la celălalte exerciții