1. 335 + 362 = 697 4. 326 + 463 =789
300+400=700
300 + 300 = 600 20+60=80
30 + 60 = 90 6+3=9
5 + 2 = 7
2. 435 + 343 =778
400 + 300=700
30+40=70
5+3=8 5. 353 + 745 = 1098
300+700=1000
50+40=90
3+40=8
3. 343 + 635 =978
300+600=900
40+30=70
3+5=8 6. 443 + 345 =788
400+300=700
40+40=80
3+5=8