Rebecca Wingard-Nelson - Subtraction and Addition

SUBTRACTION PLUS ADDITION EQUALS EASY! Learn to add and subtract mixed numerals and decimals. Pick up great tips for solving word problems. Add and subtract money and time values, and learn to estimate. 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 perfect choice.

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FREE WORKSHEETS AVAILABLE AT ENSLOW.COM

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About The Author Author Rebecca Wingard-Nelson has worked in public, private, and home-school mathematics education. Not every person is an accountant, engineer, rocket scientist, or math teacher. Not every person is an accountant, engineer, rocket scientist, or math teacher.

However, every person does use math. Most people never think, I just used math to decide if I have enough milk for this week! But that is exactly what they did. Math is everywhere; we just dont see it because it doesnt always look like the math we do at school. Math gives you the power to

• determine the best route on a trip
• keep score in a game
• choose the better buy
• figure a sale price
• plan a vacation schedule

Addition and subtraction are the most basic math operations. They are used in every persons daily life. Addition tells you how much you are spending when you buy more than one thing.

Subtraction helps you compare sizes, prices, and amounts. This book will help you understand subtraction and addition. It can be read from beginning to end, or used to review a specific topic.

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You can add numbers together to find how many you have in all.

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Marlon has 3 guppies. Jeri gives him 2 more.

How many guppies does Marlon have in all? One way to add is to count on. One way to add is to count on. Step 1: Marlon starts with 3 guppies. Step 2: Jeri gives him 2 more. Begin with 3, count on 2 more. Write answers using sentences like this... 5 guppies Numbers that are added are called addends. + = 5 Answers to addition problems are called sums. 3 + 2 = Addition problems may be written in a line or a column. 3 + 2 = 5 The one-digit numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. 3 + 2 = 5 The one-digit numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

This table shows the one-digit addition facts that have one-digit answers. Trina has 6 wristbands. She buys 3 more. How many wristbands does Trina have in all? To solve this problem, add 6 + 3. Step 1: Use basic addition facts to find the sum. 6 + 3 = 9 Trina has 9 wristbands in all.

Addition gives you the POWER to understand other math operations.
Subtraction is the opposite of addition.
Multiplication is repeated addition.

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Sometimes when you add a one-digit number, the sum has two digits. Use place value to regroup.

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Place value tells you how much each digit in a number stands for. 62 is the same as
6 2
6 tens 2 ones 457 is the same as
4 5 7
4 hundred 2 tens 7 ones What is 7 + 5?Step 1: Put dots under each number in the problem. Step 2: Move 7 dots into the box Step 3: Use some of the 5 dots to fill the box. Step 2: Move 7 dots into the box Step 3: Use some of the 5 dots to fill the box.

There are 2 dots left outside the box.
You have 1 group of ten in the box, and 2 ones left outside. Another way to say 1 ten and 2 ones is . 7 + 5 = 12 This table shows the one-digit addition facts with two-digit sums. Mark made 9 drawings of buildings and 4 drawings of gardens. How many drawings did Mark make in all?

To solve this problem, add 9 + 4. 9 + 4 = 13 Mark made 13 drawings in all.

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Adding numbers that have more than one digit is easy when you understand place value.

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Before you add numbers, line up the digits in columns by their place value. Renee worked 24 days. Renee worked 24 days.

Then she worked 11 more. How many days did Renee work? To solve this problem, add 24 + 11. Step 1: Column addition keeps the place values in line. Write the problem in a column. Line up the digits that have the same place value. 4 + 1 = 5. 4 + 1 = 5.

Write a 5 in the ones place. Step 3: Add tens. 2 + 1 = 3. Write a 3 in the tens place. Renee worked 35 days in all. Mr.

Snethen has a big glass case in his classroom with 1,224 bugs in it. He also has a display in the hallway with 352 bugs in it. How many bugs does Mr. Snethen have in all?

To solve this problem, add 1,224 + 352. Step 1: Write the problem in a column. Step 2: All numbers with more than one digit are added one place value at a time. Add ones. 4 + 2 = 6. 4 + 2 = 6.