Two-step addition and subtraction problems
Solve addition and subtraction two-step problems in contexts, deciding which operations and methods to use and why
Share and support
Teaching Table
Set out your lesson
Plan and solve a two-step addition or subtraction problem. Explain each operation and choose a suitable mental or written method.
Ask what total and remaining mean. Ask for 900 − 400 (500) and ask the learner to set out 1,246 + 578. Expect 1,824. Use the earlier column lesson if written work is not secure. Read the story aloud if reading is the barrier and record that support.
Check readiness directly. Prerequisite availability is not attainment.
Start with the readiness check. Use Show, then Guided, then a fresh Try. These linked lessons may need several short sessions; do not impose a speed target. Read the active sheet on screen and answer on plain paper or by typing. No printer, cutting, purchase or internet is needed. The adult may read the exact prompt. Record any hints, scribing or calculation help. Oral explanations are allowed but do not show independent reading or handwriting. Use as much space and time as needed; pause or split the lesson. Keep this adult guide and all keys private. Share only the active learner sheet. Before Try, put Show, Guided work and notes aside. Keep the fresh Try givens available. Give no answer or target method during the first attempt. If help is needed, give it and mark the attempt supported. Review the key after the attempt. Record the actual response and help; do not invent success or infer mastery from one attempt. These are fictional paper or oral mathematics tasks. No personal information, public sharing, purchase, physical experiment or real measurement is required.
Record the actual response and assistance. These tasks do not establish mastery.
Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view. Retain an earlier model only when the current step supplies it as context.
Teaching limits and safe use
These are finite task opportunities, not proof of mastery. Record what was attempted and what support was used.
Two-step fictional stock and purchase cases only; reading support is distinct from independent problem interpretation. Real purchases are not required.
Record the actual response and assistance. These tasks do not establish mastery.
Compare teaching approaches
Teaching approaches
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1 approach
Plan and solve a two-step addition or subtraction problem. Explain each operation and choose a suitable mental or written method.
Plan and solve a two-step addition or subtraction problem. Explain each operation and choose a suitable mental or written method.
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
External links for extra practice. They do not replace Gakuva’s teaching approach.
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The teaching approach appears above.
Check understanding
- Identify the two steps needed to solve a contextual problem
- Choose between mental and written methods for each step based on the numbers
- Explain why the chosen operations and methods are appropriate
“If your child reads a word problem with two steps — like working out change from a shopping trip with two items — can they plan which calculations to do and in what order?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 8–9
Standards