Activity

Missing Number Challenge

Use interval clues to identify missing values in increasing and decreasing sequences.

Age
Age 8
Subject
Mathematics
Topic
Number Recognition
Difficulty
Medium

Instructions

Write a five-number sequence with one value hidden and a constant step such as 5, 10, or 25. Ask the learner to find the step between visible neighbours. Use that step to name the missing number. Check by reading the completed sequence forward and backward. Swap roles and create four more sequences.

Activity details

Duration
25 minutes
Setting
Tabletop
Learning objective
Identify and explain a constant step in number sequences within 1,000.
Materials
Paper, pencil, and optional number cards.

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