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Features

  • Every lesson of the unit, in the same kinds of question as the test
  • Count back on a number line, think addition to subtract, and write fact families
  • Get to 10 first to subtract, cross out pictures in ten frames, and find missing numbers
  • Balance both sides of an equal sign, decide if equations are true or false, and find the unknown in any spot
  • Subtract and add facts to 20, and solve a follow-the-arrows number puzzle
  • Every question is on a 1st grade Common Core standard
  • Answer keys name the lesson and skill of every question

Skills Covered

  • Count back to subtract on a number line
  • Think addition to subtract (8 + ___ = 15)
  • Write the four facts of a fact family
  • Get to 10 first to subtract (13 − 3 − 2)
  • Subtract with pictures in ten frames
  • Find a missing number within 20
  • Understand the equal sign as "the same as"
  • Decide if an equation is true or false
  • Find the unknown in any spot (□ − 4 = 6)
  • Subtraction facts to 20
  • Add and subtract facts mixed
  • Solve a follow-the-arrows number puzzle

How to Use This Pack

Two pages that go over the whole unit on subtraction to 20 and the equal sign, to do together the day before the test. Its 12 questions are the same kinds as the test's, with other numbers, so nothing on the review is 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 counters and a number line out. Work a question, then let students try the next one on their own, and stop on any that trip up more than a few. Questions 8 and 9 (the balance and true or false) check the meaning of the equal sign; build them with counters or a pan balance if students are unsure. The keys 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. Read each question aloud with your child, and ask them to explain how they found each answer: did they count back, think addition or get to 10 first?

Tips for Success

  • Read the questions aloud for students who are still learning to read
  • Counting back works best for taking away 1, 2, 3 or 4
  • To subtract 9 or 8, think addition: 8 and what make 15?
  • The equal sign means both sides are the same, not "the answer comes next"
  • 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:

  • K.OA.A.1 Show adding and taking away in many ways: fingers, objects, pictures, sounds, acting out, words, or number sentences.
  • 1.OA.B.4 Treat subtraction as finding a missing addend: to solve 12 - 9, ask what added to 9 makes 12.
  • 1.OA.C.5 Connect counting with adding and subtracting, such as adding 4 by counting on four more.
  • 1.OA.C.6 Add and subtract to 20, working fluently within 10, with strategies like counting on, making ten, fact families and doubles plus one.
  • 1.OA.D.7 Know the equal sign means both sides have the same value, and decide whether addition and subtraction equations hold true.
  • 1.OA.D.8 Solve for the missing number in adding or subtracting equations like 9 + ? = 15 or ? - 4 = 6.

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

1st Grade Subtraction and Equal Sign Unit Review

A review of the unit on subtraction to 20 and the equal sign, to go over together the day before the test. Students count back, get to 10 first, write fact families, check if equations are true and find the unknown in any spot.

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What’s Included

  • A two-page review of every lesson in the unit (12 questions)
  • Answer keys that name each question's lesson and skill (4 pages in all)
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