Transcript My Math Chapter 1
PLACE VALUE
Standard form: 804,932,008 *Each group of three digits is called a period separated by a comma and is Word form: eight hundred four million , nine hundred thirty-two thousand , eight *When you get to the comma, say the period * Expanded form: 8 x 100,000,000 + 4x 4,000,000 + 9x 100,000 + 3 x 10,000 + 2 x 1,000 + 8 *Split up the number using place value. For example, an 8 in the hundred millions place equals 8 x 100,000,000.
• You can line up the numbers to compare • Example: 76,552 Ο 76,852 76, 5 52 76, 8 52 5 < 8 so 76,552 < 76,852
Examples: 7 17 = 0.7
= 0.017
54 = 0.54
10 100 1,000
Word form 0.55
1. Say the decimal as a whole number
fifty-five
2.
Label the place value. In what column does the number end?
hundredths
Word form is fifty-five hundredths
Standard form twenty-seven thousandths 1. What is the place value?
Thousandths = 0. __ __ __
2.
Place the numbers to the right 0. 0 2 7
Standard form is 0.027
Expanded form Multiply each number by it’s place value. 0.95
0.95 = (9 x 1/10) + (5x 1/100)
• You can line up the numbers to compare • Example: 0.592 Ο 0.512
0.5
9 2 0.5
1 2 9 > 1 so 0.592 > 0.512