Fluently add and subtract within 20 using mental strategies
Adding strings of numbers by find pairs of ten
Pairs of Ten
I created this a remediation for my 4th graders who were having trouble adding three or four numbers in a column together. I wanted students to see how making ten would help them add quickly. If students had the numbers 7 + 6 + 3 stacked up in a column they could pair the 7 with the 3 to make 10 and then add 6 to make 16 easily!