Question

calculeaza in scris si verifica dupa model 1145•7=(1000+100+40+5)•7. =1000•7+100•7+40•7+5•7. ==7000+700•280+35=8015. 69•6= 285•9= 248•7. 1107•3= 1043•6= 13025•2= 116241•2=

Answer 1

69×6=414
69x6=(60+9)x6=60x6+9x6=360+54=414

285×9=2565
(200+80+5)x9=200x9+80x9+5x9=1800+720+45=2565

248×7=1736
(200+40+8)x7=200x7+40x7+8x7=1400+280+56=1736

1107×3=3321
(1000+100+7)x3=1000x3+100x3+7x3=3000+300+21=3321

1043×6=6258
(1000+40+3)x6=1000x6+40x6+3x6=6000+240+18=6258

13025×2=26 050
(10 000+3 000+20+5)x2=10 000x2+3 000x2+20x2+5x2=20 000+6 000+40+10=26 050

116241×2=232 482
(100 000+10 000+6000+200+40+1)x2=
=100 000x2+10 000x2+6000x2+200x2+40x2+1x2=
=200 000+20 000+12 000+400+80+2=
=232 482