Florida B.E.S.T. MA.1.NSO.2
B.E.S.T. Standard (Benchmark Cluster)
Develop an understanding of addition and subtraction operations with one- and two-digit numbers.
Florida B.E.S.T. Standards for Mathematics
Cluster contents
Benchmarks in This Standard
MA.1.NSO.2 is a B.E.S.T. standard. These are the benchmarks under it.
- MA.1.NSO.2.1
Recall addition facts with sums to 10 and related subtraction facts with automaticity.
- MA.1.NSO.2.2
Add two whole numbers with sums from 0 to 20, and subtract using related facts with procedural reliability.
- MA.1.NSO.2.3
Identify the number that is one more, one less, ten more and ten less than a given two-digit number.
- MA.1.NSO.2.4
Explore the addition of a two-digit number and a one-digit number with sums to 100.
- MA.1.NSO.2.5
Explore subtraction of a one-digit number from a two-digit number.
Teacher's field guide
What This Cluster Means
What Students Need to Do
- Students model addition as putting together and subtraction as taking apart, taking away, or comparing. They use objects, drawings, number lines, and equations with one- and two-digit numbers.
What Mastery Looks Like
- Given a story, students choose addition or subtraction and explain why. They solve accurately, show a clear strategy, and check their answer using a related operation.
Common Misconceptions
- Students may choose an operation from a keyword instead of thinking about the situation. They may count tens as ones, reverse subtraction order, or misuse the equal sign.
How to Assess It
- Exit ticket: “Lena has 16 stickers and gets 7 more. Then write a different story for 23 − 7.” Students solve both with drawings or equations.
Lesson moves
Ways to Teach It
Give pairs base-ten blocks to model 24 + 8 and 32 − 8, then draw and label each change.
Ask, “How are 14 + 6 and 20 − 6 related?” Have students write two sentences using a drawing as evidence.
Play Target 20: students draw number cards, choose addition or subtraction, and record equations that equal 20.
Set up a snack stand with 35 items; students record deliveries with addition and sales with subtraction, then update the inventory.
Free download
Printable MA.1.NSO.2 Worksheet
A ready-to-print activity worksheet aligned to MA.1.NSO.2, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
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Related Standards
- MA.K.NSO.3
Develop an understanding of addition and subtraction operations with one-digit whole numbers.
- MA.1.AR.2
Develop an understanding of the relationship between addition and subtraction.
- MA.4.NSO.2
Build an understanding of operations with multi-digit numbers including decimals.
- MA.3.NSO.2
Add and subtract multi-digit whole numbers. Build an understanding of multiplication and division operations.
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