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MA.2.AR.1.1: Solve one- and two-step addition and subtraction real-world problems. (Lesson 7-1, 7-2, 7-3, 7-4, 7-5, & 7-6)
Solve addition and subtraction real-world problems using objects, drawings or equations to represent the problem.
(aligns with MA.1.AR.1.2; foundational to MA.2.AR.1.1)
When problems have more than one step, you answer one step at a time and show your work.
7.1 Video strategies to solve two step add to and take from problems
Click on video for more information on how to use strategies.
Problems with more than one step NEED more than one equation to solve.
7.2 More strategies to solve two step
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COMPARISON problems have more than one step to solve.
7.3 solve two-step problems with comparison
Click on video for more information on how to use strategies.
You can use different addition strategies to solve two-step word problems.
Strategies:
base ten models
open number line
decompose addends
adjust addends
(do not show standard algorithm - we will introduce this in later units and we use as CER (claim, evidence and reason)-deeper depth of knowledge concept.
7.4 one step and two step problems using addition
Click on video for more information on how to use strategies.
You can use subtraction strategies to solve two-step word problems.
base ten models no regrouping
base ten models with regrouping
open number line
decompose one addend
adjust numbers
7.5 two step problems using subtraction
Click on video for more information on how to use strategies.
A problem with more than one step can include BOTH addition, subtraction, or both.
7.6 solve two step problems using addition and subtraction
Click on video for more information on how to use strategies.
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MA.1.NSO.2.1: Recall addition facts with sums to 10 and related subtraction facts with automaticity.
MA.2.NSO.2.1: Recall addition facts with sums to 20 and related subtraction facts with automaticity.
MA.2.NSO.2.3: Add two whole numbers with sums up to 100 with procedural reliability. Subtract a whole number from a whole number, each no larger than 100, with procedural reliability.
On our Unit 7 test we will have questions how to solve near double to subtract.