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# Learning Gym: Basic Math: Subtraction

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Basic Math: Subtraction

• Print this Unit

Click on the document below to print out a tracking sheet that will get you started on the Subtraction Unit.

Introduction

 Concept/Skill Sample Learn Zillion Khan Academy Breakthrough to Math, Level 1, Book 3 Foundations Mathematics Number Power 1 Breakthrough to Math, Workbook WorkWise: Math at Work What is subtraction? 7-5 means you have 7 and take 5 away to have 2 left Basic Subtraction 6-10 29 17 Introduction to Subtraction

Problem Solving

 Concept/Skill Sample Learn Zillion Khan Academy Breakthrough to Math, Level 1, Book 6 Foundations Mathematics Number Power 1 Breakthrough to Math, Workbook WorkWise: Math at Work Solving subtraction word problems If you had \$123  but you spent \$17, how much do you have left? Subtraction Word Problems with 10 9-12 36-38 52-56 20-21 Exercise 2

Calculations

 Concept/Skill Sample Learn Zillion Khan Academy Breakthrough to Math, Level 1, Book 3 Foundations Mathematics Number Power 1 Breakthrough to Math, Workbook WorkWise: Math at Work Subtraction Facts within 10 8-3=5 Subtracting different ways 11-13 28-29 (skip problems with numbers greater than 10) Subtraction Facts within 20 13-6=7 Subtract within 20 by subtracting parts: Video Subtracting 14-6 35-36 30-32 Subtracting 2-, 3-, and 4- digit numbers 379-51=228 Subtracting 1, 10, or 100 14-23 37-38 (Problems #1-10) Subtracting 1s, 10s, or 100s Borrowing 501-289=212 Solve subtraction problems: using regrouping: Video Worked example: Subtracting 3-digit numbers (regrouping) 24-56 32-34 39-42 37-42 Concept/Skill Sample Learn Zillion Khan Academy Breakthrough to Math, Level 1, Book 3 Foundations Mathematics Number Power 1 Breakthrough to Math, Workbook WorkWise: Math at Work

Problem Solving Post-Test

 1. In the Breakthrough to Math, Level 1, Workbook, complete Worksheet 62 (p 64).  It is OK to use a calculator for this post-test. 2. Answers can be found on page 80. 3. A passing score is 8 out of 10.

Calculations Post-Test

 In the Breakthrough to Math, Level 1, Book 3, complete the Post Test on page 60.  You may NOT use a calculator for this post-test. 2. Answers can be found on page 61. 3. A passing score is 10 out of 11.