To add two-digit numbers, you need to think about place value. You start by adding up how many ones you have. If you have more than 10 ones, you can put a group of ten into the tens column.

Tape Diagrams: 2-Digit Addition and Subtraction | Grade 2. Special | 2m 20s. Your child continues to use tape diagrams as a visual tool to solve word problems. 03/01/2017 | Rating NR.

Many students in the first years of primary school create all the combinations of two single digit numbers that give a total of ten. 9 + 1, 8 + 2, 7 + 3, 6 + 4, 5 + 5 … ...