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Features

  • Every lesson of the unit, in the same kinds of question as the test
  • Add by partial sums, and add in columns regrouping ones, tens or both
  • Subtract by breaking apart the number taken away, and by counting up on an open number line
  • Subtract in columns, across zeros too
  • Mental math with a hundred: make a hundred, take away a hundred and add back, add the pair that makes a hundred first
  • Solve a one-step and a two-step story problem with a number sentence for each step
  • The last two questions (adding and subtracting four-digit numbers, and = or ≠ between two sums or differences) are for the states that teach them in 3rd grade
  • Answer keys name the lesson and skill of every question

Skills Covered

  • Add by partial sums
  • Add in columns, regrouping ones, tens or both
  • Subtract by breaking apart the number taken away
  • Count up to subtract on an open number line
  • Subtract in columns, trading a ten, a hundred or both
  • Subtract across zeros (600 − 247, 403 − 168)
  • Mental math with a hundred (398 + 256, 643 − 298)
  • One- and two-step story problems within 1,000
  • Add and subtract four-digit numbers
  • Equal or not equal (= and ≠)

How to Use This Pack

Two pages that go over the whole unit on adding and subtracting within 1,000, to do together the day before the test. Its 11 questions are the same kinds as the test's, in the same order, with other numbers, so no question on the review is on the test. Questions 10 and 11 (four-digit numbers, and = or ≠) are for the states that teach them, as on the test. There is no Score line: it is practice, not a grade. The pre-check and the unit test are packs of their own.

In the Classroom

Do the review together the day before the test, with base-ten blocks on the tables. Work a question, then let students try the next one on their own, and stop on any that trip up more than a few. The keys show one way for the count-up and one number sentence for each story; any jumps that add up to the answer, and any sentence that fits the story, are right. The keys write every carried 1 and traded digit and name each question's lesson, so a question the class misses points to the lesson to go back to.

At Home

Use the review as practice before a test at school. Ask your child to estimate first, then check that the answer is close to the estimate.

Tips for Success

  • Keep base-ten blocks out
  • Ask "do the ones make a new ten?" before every column problem
  • Have students check a subtraction by adding the answer back
  • On the zeros, trade a hundred for ten tens first, then a ten for ten ones
  • Go back to the lesson the key names for a question the class misses

Common Core Standards Alignment

This pack supports the following Common Core State Standards for Mathematics:

  • 3.OA.D.8 Solve two-step story problems with +, −, × and ÷, using a letter for the missing amount, and check answers by estimating or rounding.
  • 3.NBT.A.2 Add and subtract to 1,000 fluently using place-value strategies and written methods, properties of addition, and fact-family relationships.

© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

3rd Grade Add and Subtract Within 1,000 Unit Review

A review of the unit on adding and subtracting within 1,000, to go over together the day before the test. Students add by partial sums and in columns, subtract by breaking apart, counting up and trading across zeros, use a hundred to do mental math, and solve one- and two-step story problems.

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What’s Included

  • A two-page review of every lesson in the unit (11 questions)
  • Answer keys that name each question's lesson and skill (4 pages in all)
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