Understand the concept
Exchange a ten for ten ones when necessary.
Calculate 52 − 28.
- Step 1: Exchange one ten to get 4 tens and 12 ones
- Step 2: 12 − 8 = 4
- Step 3: 4 tens − 2 tens = 2 tens.
Final answer: 24
Calculate 61 − 34.
Show the answer
27
Try another similar question and explain each step aloud. Refer to your school syllabus for topic level and notation.