David follow up Activity

28 + 34 = ? today we have been learning about using 2 stragites to answer 1 qweston  here is my work

20 + 30 = 50

8 + 4 = 12

50 + 12 = 62

28 + 34=?

30 + 32=62


37 + 44 = ?

30 + 40 + 70

7 + 4 = 11

70 + 11 = 81