Question

12. Calculează respectând ordinea operaţiilor. a) 247 - 3 x 8 = 629 + 5 x 5 = 400 6 x 3 = 621 - 6 × 6 = - b) 27+ 3 x 9-2x6 = 100-4x4-9×4= 243 + 6 x 8-7×7= 7035 x 9+2×9=​

Answer 1

Răspuns:

a) 247 - 3 × 8 = 223

247 - 24 = 223

629 + 5 × 5 = 654

629 + 25 = 654

621 - 6 × 6 = 585

621 - 36 = 585

b) 27 + 3 × 9 - 2 × 6 = 42

27 + 27 - 12 =

54 - 12 = 42

100 - 4 × 4 - 9 × 4 = 48

100 - 16 - 36 =

84 - 36 = 48

243 + 6 × 8 - 7 × 7 = 242

243 + 48 - 49 =

291 - 49 = 242

7035 × 9 + 2 × 9 = 63333

63315 + 18 = 63333

Answer 2

a). 247-3x8=247-24=223;629+5x5=629+25=654; 4006x3=12.018; 621-6x6=621-35=585
b).27+3x9-2x6=27+27-12=49-12=37; 100-4x4-9x4=100-16-36=84-36=48; 243+6x8-7x7=243+48-49=271-49=222 ;
7035x9+2x9=63.315+18=63.333