calculează dupa model va rog sa ma ajutati dau coroana.

a)
5×16=5×(10+6)=5×10+5×6=50+30=80
6×12=6×(10+2)=6×10+6×2=60+12=72

b)
4×22=4×(20+2)=4×(10+10+2)=4×10+4×10+4×2=40+40+8=80+8=88
7×23=7×(20+3)=7×(10+10+3)=7×10+7×10+7×3=70+70+21=140+21=161

c)
4×234=4×(200+30+4)=4×200+4×30+4×4=800+120+16=920+16=936
6×142=6×(100+40+2)=6×100+6×40+6×2=600+240+12=840+12=852

Sper ca te-am ajutat!!
(^·^)

a.)
5x16=5x(10+6)=5x10+6x5=50+30=80

6x12=6x(10+2)=6x10+2x6=60+12=72

b.)
4x22=4x(20+2)=4x20+2x4=80+8=88

7x23=7x(20+3)=7x20+3x7=140+21=161

c.)
4x234=4x(200+30+4)=4x200+30+4x4=800+12+16=920+16=936

6x142=6x(100+40+2)=6x100+6x40+6x2=600+240+12=840+12=852.

Succes!