Rebecca Wingard-Nelson - Ready for Subtraction

GET READY, GET SET, SUBTRACT! Do you wish someone could help you understand subtraction? Rebecca Wingard-Nelson simply explains one-digit, two-digit, and three-digit subtraction. You will learn about estimating, regrouping, place value, and more. Whether you are learning this information for the first timeon your own or with a tutoror you would like to review your math skills, this book is a great choice.

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FREE WORKSHEETS AVAILABLE AT ENSLOW.COM

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About The Author Author Rebecca Wingard-Nelson develops and writes math assessment tests, exit exams, proficiency tests, textbooks, and workbooks. She has written many math series for Enslow Publishers, Inc. Math is used everywhere, and it is an important part of your life.

You use math when you are playing games, cooking food, spending money, telling time, reading music, and doing any other activity that involves numbers. Even finding a television station uses math! Subtraction Is Everywhere You use subtraction all the time and probably never think about it. Every time you find the difference between two values, you are subtracting. When you find how long it took you to do something, you are subtracting time values. When you buy something and receive change, you are subtracting money values. When you have a certain amount of homework to do, and finish part of the problems, you use subtraction to figure out how many you still have left to do.

Using This Book This book can be used to learn or review subtraction at your own speed. It can be used on your own or with a friend, tutor, or parent. Get ready to discover math... made easy!

When you subtract, you take away one number from another number. If you have seven cookies and you take away (or subtract) two cookies, you will have five cookies left. 7 2 = 5 Subtraction can tell you the difference between two things.

One example is a difference in age between two people.

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Jennifer is 8 years old. Her brother Bobby is 3 years old. Use subtraction to find the difference in their ages.

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The difference between Jennifers age and Bobbys age is 5 years. Here is a list of basic subtraction facts. Here is a list of basic subtraction facts.

If you memorize these basic facts, subtracting larger numbers will be easy.

0 0 = 0	5 0 = 5	8 0 = 8
5 1 = 4	8 1 = 7
1 0 = 1	5 2 = 3	8 2 = 6
1 1 = 0	5 3 = 2	8 3 = 5
5 4 = 1	8 4 = 4
2 0 = 2	5 5 = 0	8 5 = 3
2 1 = 1	8 6 = 2
2 2 = 0	6 0 = 6	8 7 = 1
6 1 = 5	8 8 = 0
3 0 = 3	6 2 = 4
3 1 = 2	6 3 = 3	9 0 = 9
3 2 = 1	6 4 = 2	9 1 = 8
3 3 = 0	6 5 = 1	9 2 = 7
6 6 = 0	9 3 = 6
4 0 = 4	9 4 = 5
4 1 = 3	7 0 = 7	9 5 = 4
4 2 = 2	7 1 = 6	9 6 = 3
4 3 = 1	7 2 = 5	9 7 = 2
4 4 = 0	7 3 = 4	9 8 = 1
7 4 = 3	9 9 = 0
7 5 = 2
7 6 = 1
7 7 = 0

Subtraction problems can be written in two ways, in a line or in a column. line
6 5 = 1column
The subtraction symbol, , means to subtract, or take away. The symbol is sometimes called the minus sign. The equal sign, = , means equals. Equals means the same as.

When you read a subtraction problem out loud, you say, Six minus five equals one. 6 5 = 1 The number you start with in a subtraction problem is called the minuend. The number that is being taken away is called the subtrahend. The answer to a subtraction problem is called the difference.

operationAn action that works to change a number. inverse operationsOperations that undo each other. Addition and subtraction are inverse operations.

Addition puts values together and subtraction takes values apart. If you have 7 eggs and add 2 eggs, you will have 9 eggs. If you have 9 eggs and subtract 2 eggs, you have 7 eggs. You can use subtraction to check the answer to an addition problem. The answer to this addition problem is 7. When the difference is the other number in the addition problem, the sum is correct. When the difference is the other number in the addition problem, the sum is correct.

You can use addition to check the answer in a subtraction problem. The answer to this subtraction problem is 6. Add the answer to the number you subtracted. When the sum is the same as the number you started with, the answer is correct.

The Zero Propertynumber 0 = number When you subtract zero (0) from any other number, the number stays the same. The zero property of subtraction is always true, no matter how large the original number. When you subtract a number from itself, the answer is zero. Add or subtract numbers inside the parentheses first.