Question

Efectuează , după model:
12×7=(10×7)+(2×7)=70+14=84
14×5
16×4
16×9
12×6
34×8
5×68
72×3
28×2
9×75. dau coroană ​

Answer 1

Răspuns:

14×5=(10×5)+(4×5)=50+20=70

16×4=(10×4)+(6×4)=40+24=64

16×9=(10×9)+(6×9)=90+54=144

12×6=(10×6)+(2×6)=60+12=72

34×8=(30×8)+(4×8)=240+32=272

5×68=(60×5)+(8×5)=300+40=340

72×3=(70×3)+(2×3)=210+6=216

28×2=(20×2)+(8×2)=40+16=56

9×75=(70×9)+(5×9)=630+45=675