Strategy: Make 10 Appropriate Grade Level: K-2 Procedures/Steps: - Used when doing an addition problem that has a number close to 10 Child makes the number 10 by borrowing from the other number EX: 9 + 5 Child borrows 1 from 5 and adds it onto 9 Making 9 + 1 become 10 and 5 - 1 become 4 The new addition problem is now 10 + 4 9 5 New Problem: Comments and/or tips: - Children can add easier using the number 10 as their first number Make sure the child is subtracting the number from the number not closest to 10 Make sure when they are borrowing the number and adding it, they are adding it onto the closest number to 10 Strategy can be varied for more advanced student by borrowing to make the number 20 if the addition problem has higher numbers Source: Leutzinger, L. P. (1999). Developing thinking strategies for addition facts. Teaching children mathematics, 6, 14-18.