Understand the concept
Regroup a ten or hundred when needed.
Calculate 615 − 278.
- Step 1: Regroup 615 as 5 hundreds 10 tens 15 ones
- Step 2: 15 − 8 = 7
- Step 3: 10 − 7 = 3
- Step 4: 5 − 2 = 3.
Final answer: 337
Calculate 502 − 178.
Show the answer
324
Try another similar question and explain each step aloud. Refer to your school syllabus for topic level and notation.