Grade 3 · Math · Unit
Rounding, Adding, and Subtracting Within 1,000
7 lessonsabout 4 weeks
The unit ends with three more days: a review day, a day for your own unit check, and a day to act on what the check showed.
Unit 1 of 8 in the Grade 3 Math Scope and Sequence
What's included in this unit
- 7 lessons in teaching order, each with its objective and a teacher note
- 29 practice pages to print, with an easier and a harder page where available
- 4 classroom tools for the projector
- 7 activities and pages that children do on a screen
- 6 check-up pages to collect
- A worksheet maker for every lesson, for the day you need one more page
The whole unit in one file
Print every page of the unit at once, with the teacher guide first. The guide has one page per lesson: the objective, what to hand out, and the teacher note.
The unit file, the teacher guide, and saved pages are included with the Teacher plan.
Your PDF is built in your browser, so it always has the newest version of every page.
Lessons
Lesson 1
Round to the nearest ten
Children find which ten a number is closer to on a number line and round two-digit numbers to the nearest ten.
- StandardCommon Core 3.NBT.A.1Number and Operations in Base Ten
3 class days
- Day 1Teach: The Rounding Hill · Practice on paper (Core page)
- Day 2Practice and check: Practice on paper (Easier page, Harder page) · Practice on screen · Check-up page
- Day 3Reteach and extend: Act on the check-up pages: reteach the children who are not there yet, with the tool and a new page from the maker; the others take a harder page.
Warm up and teach
Practice on paper
Round It!
Rounding to the Nearest 10
Practice on screen
Lesson 2
Round to the nearest hundred
Children find which hundred a number is closer to on a number line and round three-digit numbers to the nearest hundred.
- StandardCommon Core 3.NBT.A.1Number and Operations in Base Ten
3 class days
- Day 1Teach: The Rounding Hill · Practice on paper (Core page)
- Day 2Practice and check: Practice on paper (Easier page, Harder page) · Practice on screen · Check-up page
- Day 3Reteach and extend: Act on the check-up pages: reteach the children who are not there yet, with the tool and a new page from the maker; the others take a harder page.
Warm up and teach
Practice on paper
Round to the Hundred
Rounding to the Nearest 100
Practice on screen
Lesson 3
Round, then estimate the sum
Children round two numbers to the nearest ten and add the rounded numbers to estimate the sum; with the teacher, they use an estimate to judge whether an exact answer is reasonable.
- StandardCommon Core 3.NBT.A.1Number and Operations in Base Ten
- Prepares forCommon Core 3.OA.D.8Operations and Algebraic Thinking
2 class days
- Day 1Teach: Practice on paper (Core page)
- Day 2Practice and check: Practice on paper (Easier page, Harder page) · Practice on screen · Check-up page
Practice on paper
Round, then Estimate the Sum
Practice on screen
Lesson 4
Add and subtract with regrouping
Children add and subtract in columns within 1,000, regrouping when a place has more than nine or not enough to take away.
- StandardCommon Core 3.NBT.A.2Number and Operations in Base Ten
3 class days
- Day 1Teach: The Exchange Machine · Practice on paper (Core page)
- Day 2Practice and check: Practice on paper (Easier page) · Practice on screen · Check-up page
- Day 3Reteach and extend: Act on the check-up pages: reteach the children who are not there yet, with the tool and a new page from the maker; the others take a harder page.
Warm up and teach
Practice on paper
Addition and Subtraction with Regrouping
Regrouping Review
Practice on screen
Lesson 5
Make it balance
Children use the equal sign as a balance and write the number that makes both sides the same amount.
- Goes beyondCommon Core 3.OA.A.4Operations and Algebraic Thinking
2 class days
- Day 1Teach: Number Balance · Practice on paper (Core page)
- Day 2Practice: More pages from the maker · Practice on screen
Warm up and teach
Practice on paper
Make It Balance
Practice on screen
Lesson 6
Is the sum odd or even?
Children decide whether a sum will be odd or even by looking at the ones digits of the two numbers, without adding.
- StandardCommon Core 3.OA.D.9Operations and Algebraic Thinking
2 class days
- Day 1Teach: Practice on paper (Core page)
- Day 2Practice and check: Practice on paper (Easier page, Harder page) · Practice on screen · Check-up page
Practice on paper
Odd or Even Sum? Decide Without Adding
Practice on screen
Lesson 7
Find the rule of a number pattern
Children find how much a number pattern grows or shrinks at each step and write the missing numbers.
- StandardCommon Core 3.OA.D.9Operations and Algebraic Thinking
3 class days
- Day 1Teach: Choral Counting · Practice on paper (Core page)
- Day 2Practice and check: Practice on paper (Easier page, Harder page) · Practice on screen · Check-up page
- Day 3Reteach and extend: Act on the check-up pages: reteach the children who are not there yet, with the tool and a new page from the maker; the others take a harder page.
Warm up and teach
Practice on paper
Crack the Pattern
Going Down!
