2.4.C
The Standard
solve one-step and multi-step word problems involving addition and subtraction within 1,000 using a variety of strategies based on place value, including algorithms
Texas Essential Knowledge and Skills for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students solve one-step and multistep story problems with addition and subtraction within 1,000. They decide what to do first and use place-value methods or written algorithms.
What Mastery Looks Like
- Students choose the correct operation for each step and solve accurately within 1,000. They show equations, use place-value reasoning or an algorithm, and check that the answer fits the story.
Common Misconceptions
- Students may combine every number in the problem or choose an operation from one keyword. They may stop after the first step, reverse subtraction, or regroup without tracking place values.
How to Assess It
- Give this exit ticket: “A school collected 356 cans Monday and 278 Tuesday, then donated 419. How many remain?” Require two equations and place-value work.
Lesson moves
Ways to Teach It
Use base-ten blocks to model a two-step story, record each equation, and match every regrouping move to the written algorithm.
Ask, “What happens first, and why?” Students annotate a word problem, then explain how each quantity connects to an operation.
Play Problem Sort: teams classify cards as add, subtract, or two-step, solve one card, and earn a point by justifying both operations.
Plan a class party budget: add item costs under $1,000, subtract from the budget, and explain how much money remains.
Keep exploring
Related Standards
- 3.4.K
solve one-step and two-step problems involving multiplication and division within 100 using strategies based on objects; pictorial models, including arrays, are...
- 2.4.D
generate and solve problem situations for a given mathematical number sentence involving addition and subtraction of whole numbers within 1,000
- 3.4.A
solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operation...
- 3.5.A
represent one- and two-step problems involving addition and subtraction of whole numbers to 1,000 using pictorial models, number lines, and equations
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