Question

Efectuează după model
5x37=5x(30 + 7) =5x30 + 5x 7 = 150 + 35 = 185
4 x 56 =
6 x 28=
6 x 83=
3 x 97 =
8 x 27=
2 x 79=
5 x 68=
8 x 57=
7 x 49=
9 x 48=​

Answer 1

Explicație pas cu pas:

4×56= 4×(50+6)=4×50+4×6=200+24=224

6×28=6×(20+8)=6×20+6×8=120+48=168

6×83=6×(80+3)=6×80+6×3=480+18=490

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