Lesson 1 Whole Numbers

Lesson 1 Whole Numbers

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  VUB Math FoundationsLesson1: Whole Numbers 1 LESSON 1 – WHOLE NUMBERS We will begin our study of mathematics by learning about whole numbers. Whole numbers are the numbers used most often for counting and computation in everyday life. The table below shows the specific whole-number related objectives that are the achievement goal for this lesson. Read through them carefully now to gain initial exposure to the terms and concept names for the lesson. Refer back to the list at the end of the lesson to see if you can perform each objective. LessonObjectives Identify the place value of a digit or digits in a given number. Read and write whole numbers. Round whole numbers to a given place. The key terms listed below will help you keep track of important mathematical words and phrases that are part of this lesson. Look for these words and circle or highlight them along with their definition or explanation as you work through the MiniLesson.  Whole Numbers  Number Line  Place Value  Round Whole Numbers When faced with a mathematical problem, you really have two goals. The first is to work the problem correctly and the second is to present a complete solution that can be read and understood by yourself and by others. Just because you know how to do a problem today does not mean that you will quickly remember how to do it when you look back on it in the future. Strive to present complete solutions following the examples and presentations that you see in the media links. Mathematics is really learned through writing. The better your solutions the more you will learn and retain. As you move forward in mathematics, learning to write a good solution may help you solve problems you would not have been able to otherwise. KEY TERMS MATHEMATICS AND WRITING INTRODUCTION
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  VUB Math FoundationsLesson1: Whole Numbers 2 Whole numbers are often referred to as “the counting numbers plus the number 0”. The first few whole numbers are written as: 0, 1, 2, 3, 4, 5, 6, 7, … We can place a representative set of these on a number line as follows: Note that the arrows on the number line indicate that the numbers continue in both directions. We will learn in Lesson 12 about numbers to the left of 0! We read whole numbers from left to right. To do this correctly, we need to know the place value of each digit in the number. The table below illustrates place values through the Billions place. You can use this table to help you properly identify number names. Example 1: Place each number in the chart above. What place value does the digit “0” occupy in each number? a. 25,032 b. 105,243 c. 12, 340,412 Example 2: Write each whole number below in words. a. 275,345,201 b. 502,013 PLACE VALUE
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  VUB Math FoundationsLesson1: Whole Numbers 3 To round a number means to approximate that number by replacing it with another number that is “close” in value. Rounding is often used when estimating. For example, if I wanted to add 41 and 37, I could round each number to the nearest ten (40 and 40) then add to estimate the sum at 80. When rounding, the analogy of a road may help you decide which number you are closer to. See the image below. The numbers 43, 45, and 46 are all rounded to the nearest tens place. Note that a number in the middle of the “road” is rounded up. Example 3: a. Round 40,963 to the nearest tens place. b. Round 40,963 to the nearest hundreds place. c. Round 40,963 to the nearest thousand d. Round 40,963 to the nearest ten thousand ROUNDING
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  VUB Math FoundationsLesson1: Whole Numbers 4 YOU TRY 1. Write the number 12,304,652 using words. 2. Round 12,304,652 to the nearest million. 3. Round 12,304,652 to the nearest hundred. 4. What place does the digit 3 occupy in the number 12,304,652?
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  VUB Math FoundationsLesson1: Whole Numbers 5 LESSON 1 - PRACTICE PROBLEMS 1. Identify the place value of the digit “6” in each of the following numbers. a . 356,230 b . 6,456,678 c . 300,560 d . 461,345,567 e . 6,540,345,234 f. 405,978,106 2. Write each of the following whole numbers in words. a . 356,230 b . 6,456,678 c . 300,560 d . 461,345,567 e . 6,540,345,234 f. 405,978,106
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  VUB Math FoundationsLesson1: Whole Numbers 6 LESSON 1 - ASSESS YOUR LEARNING Work the following to assess your learning of the concepts in this lesson. Try to write complete solutions and show as much work as you can. 1. Identify the place value of the digit “7” in the following number. 11,261,971 2. Identify the place value of the digit “4” in the following number. 5,241,966 3. Write the following number in words. 12,089,526 4. Write the following number in words. 8,002,079,123