Let me work through this problem step by step.
The task is about decomposing 20 into equal groups. We need to divide 20 balls evenly among different numbers of groups.
For 2 groups:
- We have 20 balls and need to split them into 2 equal groups
- 20 ÷ 2 = 10
- So each group gets 10 balls
- The equation would be: 10 + 10 = 20
For 4 groups:
- We have 20 balls and need to split them into 4 equal groups
- 20 ÷ 4 = 5
- So each group gets 5 balls
- The equation would be: 5 + 5 + 5 + 5 = 20
For 5 groups:
- We have 20 balls and need to split them into 5 equal groups
- 20 ÷ 5 = 4
- So each group gets 4 balls
- The equation would be: 4 + 4 + 4 + 4 + 4 = 20
For 10 groups:
- We have 20 balls and need to split them into 10 equal groups
- 20 10 = 2
- So each group gets 2 balls
- The equation would be: 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 20
Let me verify my calculations:
- 2 groups: 10 × 2 = 20 ✓
- 4 groups: 5 × 4 = 20 ✓
- 5 groups: 4 × 5 = 20 ✓
- 10 groups: 2 × 10 = 20 ✓
All calculations check out correctly.
Final Answer:
- 2 groups: 10 + 10 = 20 (each group gets 10 balls)
- 4 groups: 5 + 5 + 5 + 5 = 20 (each group gets 5 balls)
- 5 groups: 4 + 4 + 4 + 4 + 4 = 20 (each group gets 4 balls)
- 10 groups: 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 20 (each group gets 2 balls)
Parent Tip: Review the logic above to help your child master the concept of decomposing numbers to 20 worksheet.
