Jump and Split Addition

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Date:

📚 Part 1: Quick Check (Multiple Choice)

WALT: Use the jump and split strategies to add two-digit numbers on a number line.

Success Criteria: I can split numbers into tens and ones, make jumps on a number line, and explain my steps.

1. Which shows splitting 47 + 26 into tens and ones?

47 + 20 + 6

47 + 2 + 60

47 + 26 (no split)

2. For 23 + 15 on a number line, which jumps give 38?

+10 then +5

+5 then +10

+15 in one jump

3. You start at 34 and add 29. Which first jump helps most for a fast count?

+20

+30

4. Check all that help when using the split strategy:

Split into tens and ones

Make large jumps first, then small jumps

Use a calculator for every problem

Draw a number line and use counters

✏️ Part 2: Jump & Split Problems

5. Use the jump strategy on a number line to solve 42 + 17. Show your jumps and write the number sentence.

6. Use the split strategy to solve 56 + 28. Write the split, then the step-by-step number sentence. Explain your thinking in one sentence.

7. Check with a partner: Find 39 + 45 using both jump and split strategies. Do both methods give the same answer? Show the final answer and explain how you checked.

8. Extension (challenge): Use the split strategy to add 128 + 36 on a number line. Write the number sentence. (Hint: split into tens and ones; this is for advanced learners.)

9. Reflection: Which strategy did you prefer today — jump or split? Circle one and write one sentence why.

Jump strategy

Split strategy