Curriculum / Math / 3rd Grade / Unit 1: Rounding, Addition, and Subtraction / Lesson 12
Math
Unit 1
3rd Grade
Lesson 12 of 14
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Lesson Notes
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Subtract numbers with multiple decompositions within 1,000.
The core standards covered in this lesson
3.NBT.A.2 — Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
The foundational standards covered in this lesson
2.NBT.B.5 — Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
The essential concepts students need to demonstrate or understand to achieve the lesson objective
Suggestions for teachers to help them teach this lesson
Unlock features to optimize your prep time, plan engaging lessons, and monitor student progress.
Tasks designed to teach criteria for success of the lesson, and guidance to help draw out student understanding
25-30 minutes
Mr. Silver and Mrs. Ingall printed out some new paper base ten blocks. Now they have 9 hundreds, 2 tens, and 4 ones. Mrs. Ingall wants to represent the number 356. What will the value of the remaining paper base ten blocks be?
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Estimate. Then solve.
a. 521 − 53 = _____
b. 298 + $$\square$$ = 900
c. 772 = 1,000 − _____
Jahfree had $703 in his bank account. He bought a new couch. Now, he has $124 left in his bank account. How much money did Jahfree spend on the couch?
Grade 3 Mathematics > Module 2 > Topic E > Lesson 19 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
15-20 minutes
Problem Set
A task that represents the peak thinking of the lesson - mastery will indicate whether or not objective was achieved
5-10 minutes
Solve. Show or explain your work.
a. $$916 - 538 = $$ _____
b. _____ $$= 1,000 - 457$$
c. $$536 = 602-$$ _____
The farmer’s chickens laid 178 fewer eggs this week than last week. The chickens laid 725 eggs last week. How many eggs did the chickens lay this week?
The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.
Extra Practice Problems
Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.
Next
Solve one-step word problems involving subtraction, using rounding to assess the reasonableness of answers.
Topic A: Foundations of Place Value
Use counting, place value understanding, and addition/subtraction of ones and tens to complete a partially filled-in number grid.
Standards
3.NBT.A.13.NBT.A.2
Represent three-digit numbers using concrete manipulatives and drawings, including cases with more than 9 of any unit.
Locate three-digit numbers on a number line and explain their placement.
3.NBT.A.1
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Topic B: Rounding to the Nearest Ten and Hundred
Define estimation and its purpose. Round two-digit numbers to the nearest ten using a number line.
Round three-digit numbers to the nearest hundred using a number line.
Round three-digit numbers to the nearest ten using a number line.
Round multi-digit numbers to any place in more complex cases, including those involving real-world contexts and/or assessing the reasonableness of that estimate.
Topic C: Addition and Subtraction Within 1,000
Add numbers with up to one composition within 1,000.
3.NBT.A.2
Add numbers with multiple compositions within 1,000.
Solve one-step word problems involving addition, using rounding to assess the reasonableness of answers.
3.NBT.A.13.NBT.A.23.OA.D.8
Subtract numbers with up to one decomposition within 1,000.
Solve one- and two-step word problems involving addition and subtraction, using rounding to assess the reasonableness of answers.
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