1.3.F
The Standard
generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20
Texas Essential Knowledge and Skills for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students use a given addition or subtraction number sentence to make a matching story problem. They solve the story using numbers within 20 and explain how the equation matches.
What Mastery Looks Like
- A student can create a clear joining, separating, or comparing story for a given number sentence. The student solves it and explains how each number fits the story.
Common Misconceptions
- Students may write a story that does not match the operation, such as joining objects for subtraction. They may reverse subtraction quantities or leave out what the question asks.
How to Assess It
- Give students 14 − 6 = 8. Ask them to draw or write a matching story and label the answer.
Lesson moves
Ways to Teach It
Give pairs 15 counters and the sentence 9 + 6 = 15, then have them act out and draw a matching story.
Show 12 − 4 = 8 and ask, “What could happen in a story that matches each number?”
Play Equation Story Match with cards showing number sentences, pictures, and short word problems for students to pair.
Use a classroom snack count, such as 7 crackers plus 5 crackers, and have students write and solve a matching story.
Keep exploring
Related Standards
- 1.3.D
apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10
- 2.4.D
generate and solve problem situations for a given mathematical number sentence involving addition and subtraction of whole numbers within 1,000
- 1.3.E
explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences
- 1.5.D
represent word problems involving addition and subtraction of whole numbers up to 20 using concrete and pictorial models and number sentences
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.