Missing number problems (age 7+)
Solve addition and subtraction problems including missing-number problems, using number facts, place value, and more complex methods
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Teaching Table · Plan outline
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Learning resources
Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.
Toy Theater · Practice link — not the full lesson
Missing Addend — foundational single-digit warm-up
Find the missing number in a single-digit addition equation and check the feedback.
Single-digit warm-up only, not three-digit or multi-step practice · Ads; parent supervision recommended · No login/payment in recorded test; access can change.
Review and open practice
Audio, a complete playthrough and physical-device/mobile usability were not verified. Use separate instruction for the harder missing-number target.
Opening this link does not save learning or assess mastery.
Open practice (new tab)Parent tips
Ask which number makes the equation true, then use subtraction to check. Ask the learner to explain how they know. This discussion is parent-led.
Source, access and review notes
Choose the missing number in a single-digit addition equation and check the game's feedback. Use this as a warm-up before harder missing-number problems.
Foundational supplementary practice only; not coverage of the three-digit/multi-step Missing number problems target. Parent prompt: “What number makes this equation true? Can you use subtraction to check it? Tell me how you know.”
Tested interaction required no login or payment. Advertisement labels observed. Audio, complete playthrough, and physical-device/mobile usability were not verified. Parent supervision recommended around ads. Access and advertisements can change.
Unknown — link only
Check understanding
- Solve a missing-number problem such as 245 + ? = 380
- Choose an appropriate method (mental, written, or combination) based on the numbers
- Solve multi-step problems combining addition and subtraction of three-digit numbers
“Can your child work out sums with a hidden number — like '? − 38 = 24' or '53 + ? = 91' — by thinking carefully about what the equation is asking?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 7–8
Standards