Question

203. Efectuează, în două moduri, (9-7) x 8 = 2 x 8 = 16 MODEL (9 - 7)x 8 = (9 x 8) - (7 x 8) = 72 - 56 = 16 b) (8 - 5) x 6 (7- 2 x 4 c) (9-7) 3 ( 8-6) x 5 d) 5x (8 - 2 6x (9 - 4 a) (9- 6x4 (8-3) x 5 dună modelul dat​

Answer 1

Răspuns:

b)(8-5)×6 (7-2)×4=

1. 3×6×5×4=18×5×4=90×4=360

2.(8×6)-(5×6)×(7×4)-(2×4)=48-30×28-8=8×20=160

c)(9-7) 3 (8-6)×5=

1. 2×3×2×5=6×2×5=18×5=90

2. (9×3)-(7×3)×(8×5)-(6×5)=27-21×40-30=6×10=60

d)5×(8-2) 6 ×(9-4)=

1. 5×6×6×5=30×6×5=180×5=900

2. (5×8)-(5×2)×(6×9)-(6×4)=40-10×54-24=30×30=900

e)(9-6)×4 (8-3)×5=

1. 3×4×5×5=12×5×5=60×5=300

2. (9×4)-(6×4)×(8×5)-(3×5)=36-24×40-15=12×25=300