🎯 WALT & Success Criteria

WALT: Find missing numbers in addition number sentences.

I can:

⭐ Use what I know about addition to find a missing number.

⭐⭐ Explain how I worked out the missing number.

⭐⭐⭐ Find missing numbers in different positions in a number sentence.

📚 Part 1: Multiple Choice

Instructions: Circle the correct missing number for each question. 🔵

✏️ Part 2: Short Answer

Instructions: Write the missing number in the box. Show your working if it helps! 📝

The missing number is: ____

How did you work it out?

Way 1:   ____ + ____ = 15

Way 2:   ____ + ____ = 15

🚀 Extension Activity (Greater Depth)

Challenge yourself if you've finished! Can you solve these tricky ones?

The missing number is: ____

Explain your answer:

💡 Differentiation Strategies

(For teacher reference — remove before printing for pupils if preferred.)

Working Towards (⭐): Pupils may use a number line, counters, or cubes to support working out. Focus on Questions 1–2 only. An adult or peer may read questions aloud.

Expected (⭐⭐): Pupils attempt Questions 1–5 independently. Encourage using mental strategies such as counting on.

Greater Depth (⭐⭐⭐): Pupils complete all questions including the Extension Activity. Encourage pupils to write a number sentence of their own with a missing number for a partner to solve.

✅ Answer Key

(For teacher use only.)

Q1: 3

Q2: 6

Q3: 8

Q4: 8

Q5: 8  |  Accept any reasonable explanation e.g. "I counted on from 9 to 17."

Q6: Any two correct pairs that sum to 15 e.g. 7 + 8, 10 + 5, 6 + 9, 1 + 14, etc.

Extension Q1: 15

Extension Q2: No, Tom is wrong. The missing number is 6, not 7. (7 + 6 = 13)