Adding Tens
1.30+40=70
2.20+30=50
3.80+10=90
4.10+40=50
5.50+30=80
6.60+20=80
7.50+10=60
8.10+60=70
9.30+20=50
10.80+20=100
11.80-40=40
12.90-30=60
13.50-10=40
14.30-20=10
15.20-10=10
16.70-40=30
17.50-30=20
18.80-10=70
19.70-20=50
20.90-50=40
No comments:
Post a Comment