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When Math Word Problems Stall — Where Working Memory and Language Comprehension Collide

By Leon MoriguchiPublished May 15, 2026Updated May 18, 20264 min read日本語版あり
Audience
Parents of children in grades 2–5 (roughly 7–11 years old)

TL;DR

  • ·Word problems are not harder arithmetic — they require simultaneously holding language comprehension and numerical relationships in working memory while constructing a mental model of the situation, a genuinely different cognitive task
  • ·Meta-analyses find a moderate but real correlation between working memory capacity and word problem performance; when a child can compute but cannot solve word problems, working memory or language comprehension is typically the constraint, not the arithmetic itself
  • ·Three load-reducing techniques work at home: read the problem aloud, draw a picture of the situation, and identify what the question is asking before reading the full problem

Contents

  1. Lead
  2. Background
  3. Working Memory and Word Problem Performance
  4. Practical Approaches
  5. Three Ways to Reduce the Cognitive Load
  6. Practical Takeaways
  7. Summary
  8. References

Lead

Arithmetic drills: eight out of ten correct. Word problems: total freeze. "How can you do the calculation but not solve the problem?" — that question is usually directed at the child. But word problems genuinely require more than arithmetic. They are not simply harder arithmetic. They are a different kind of task.

"Can calculate but can't solve word problems" is not a skills deficit. It is a bottleneck that emerges when multiple cognitive processes are demanded simultaneously. At the center of that bottleneck is the interaction between working memory and language comprehension.

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