Question

Efectuează, după model:
12 * 7 = (10 x 7) + (2 x 7) = 70 + 14 = 84
14 x 5
13 x 6
72 x 3
16x4 34 x 8 28 x 2
19 x 9 5 x 68 9 x 75
​

Answer 1

Răspuns:

14×5=(10×5)+(4×5)=50+20=70

13×6=(10×6)+(3×6)=60+18=78

72×3=(70×3)+(2×3)=210+6=216

16×4=(10×4)+(6×4)=40+24=64

34×8=(30×8)+(4×8)=240+32=272

28×2=(20×2)+(8×2)=40+16=56

19×9=(10×9)+(9×9)=90+81=171

5×68=(5×60)+(8×6)=300+48=348

9×75=(70×9)+(9×5)÷630+45=675