Adding on Tens By Asinate

L-I :W.A.L.T.-add tens to any number by counting in tens or adding tens together.
Success Criteria-I am successful when I can add tens together.

problems:
1.40 carving + 20 carving=60 
I know that 4 tens + 2 tens =6 tens

2.37 banana +40 banana =77
I know it is 77 because 30+40=70+7=77

3.15+ 5+ 10=30
I know it is 30 because 15+5=20+10=30

4.6+4+2+7+8=27
I know it is 27 because 6+4=10+2+8=10 so 10+10=20+7=27

5.43+7+30=80
I know it is 80 because 43+7=50 so 50+30=80