Question

Calculează după model :a)4×14=4×(10+4) =4×10+4×4=40+16=56 5×16= 6×12= b)3×24=3×(20+4)=3×(10+10+4)=3×10+3×10+3×4=30+30+12=72 4×22= 7×23= c) 5×123=5×(100+20+3)=5×100+5×20+5×3=500+100+15=615 4×234= 6×142=

Answer 1

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=
88

7×23=
7×(20+3)=
7×(10+10+3)=
7×10+7×10+7×3=
70+70+21=
161

c)
4×234=
4×(200+30+4)=
4×200+4×30+4×4=
800+120+16=
936

6×142=
6×(100+40+2)=
6×100+6×40+6×2=
600+240+12=
852

Dacă tu crezi că merit, astept coroana!