Question

calculați,descompunând termeni în sute, zeci și unități:635+276,475+158,374+259,189+452,135+178,125+575.

Answer 1

600+30+5+200+70+6=911
400+70+5+100+50+8=633
300+70+4+200+50+9=633
100+80+9+400+50+2=641
100+70+8,100+20+5+500+70+5=778,1

Answer 2

635+276=(600+30+5)+(200+70+6)=(600+200)+(30+70)+(5+6)=800+100+11=911

475+158=(400+70+5)+(100+50+8)=(400+100)+(70+50)+(5+8)=500+120+13=633

374+259=(300+70+4)+(200+50+9)=(300+200)+(70+50)+(4+9)=500+120-13=633

189+452=(100+80+9)+(400+50+2)=(100+400)+(80+50)+(9+2)=500+130+11=641

135+178=(100+30+5)+(100+70+8)=(100+100)+(30+70)+(8+5)=200+100+13=313

125+575=(100+20+5)+(500+70+5)=(100+500)+(20+70)+(5+5)=600+90+10=700