Question

Calculează respectând ordinea efectuării operațiilor și parantezele rotunde. a. 60-(7x9-6x7) d. (7x3-9) x2-64: (8:4+36:6) e. (36-4x9x0) x 4-12 x 12 b. 39+8x12+3x (12:4-2) c72: (9x4-4x7) +90-9×8 f. 2x (28-81:9x3)+2:(6*7-5×8)​

Answer 1

Răspuns:

60 - ( 7×9 - 6×7) = 39

60 - ( 63 - 42 ) =

60 - 21 = 39

( 7 × 3 - 9 ) × 2- 64 : ( 8 : 4 + 36 : 6 ) = 16

( 21 - 9 ) × 2 - 64 : ( 2 + 6 ) =

12 × 2 - 64 : 8 =

24 - 8 = 16

( 36 - 4 × 9 × 0 ) × 4 - 12 × 12 = 0

( 36 - 36 × 0 ) × 4 - 12 × 12=

( 36 - 0 ) × 4 - 12 × 12 =

36 × 4 - 12 × 12 =

144 - 144 = 0

39 + 8 × 12 + 3 × ( 12 : 4 - 2 ) = 138

39 + 8 × 12 + 3 × ( 3 - 2 ) =

39 + 8 × 12 + 3 × 1 =

39 + 96 + 3 = 138

72 : ( 9 × 4 - 4 × 7 ) + 90 - 9 × 8 = 27

72 : ( 36 - 28 ) + 90 - 9 × 8 =

72 : 8 + 90 - 9 × 8 =

9 + 90 - 72 =

99 - 72 = 27

2 × ( 28 - 81 : 9 × 3 ) + 2 : ( 6 × 7 - 5 × 8 ) = 3

2 × ( 28 - 9 × 3 ) + 2 : ( 42 - 40 ) =

2 × ( 28 - 27 ) + 2 : 2 =

2 × 1 + 2 : 2 =

2 + 1 = 3