Răspuns :
70+103=173 (timbrele lui Ioana)
70+173=243(timbrele lui Doru)
70+173+243=486
Răspuns:
1) Cate timbre are Ioana ?
70+103=173(timbre Ioana)
2)Cate timbre are Doru?
70+173=243(timbre Doru)
3)Cate timbre au copiii in total ?
70+173+243=486(timbre in total)