add y2 sub 2digit

What you'll learn

1. 1

   To subtract 2-digit numbers, take away the tens and the ones separately.

2. 2

   58 − 23. Tens: 50 − 20 = 30. Ones: 8 − 3 = 5. Together: 35.

3. 3

   What is 76 − 34?

4. 4

   When the ones on top are too small, unbundle a ten into ten ones first.

5. 5

   52 − 27. You cannot do 2 − 7. Unbundle: 52 becomes 40 and 12. Ones: 12 − 7 = 5. Tens: 40 − 20 = 20. Answer: 25.

6. 6

   What is 63 − 28?

7. 7

   Mia does 52 − 27 and gets 35, by doing 7 − 2 for the ones. What went wrong?