Question

ma puteti ajuta va rog

Answer 1

Exercitiul 2:

80×5=400

50×7=350

90×9=810

60×6=360

4×60=240

9×40=360

2×70=140

8×80=640

70×4=280

30×8=240

80×6=480

70×8=560

3×50=150

6×70=420

4×50=200

6×90=540

Exercitiul 3:

4×56= 4×(50+6)=4×50+4×6=200+24=240

6×28=6×(20+8)=6×20+6×8=120+48=168

6×83=6×(80+3)=6×80+6×3=480+18=498

3×97=3×(90+7)=3×90+3×7=270+21=291

8×27=8×(20+7)=8×20+8×7=160+56=216

2×79=2×(70+9)=2×70+2×9=140+18=158

5×68=5×(60+8)=5×60+5×8=300+40=340

8×57=8×(50+7)=8×50+8×7=400+56=456

7×49=7×(40+9)=7×40+7×9=280+63=343

9×48=9×(40+8)=9×40+9×8=360+72=432