4. Standard Form: Uses Digits and Place Value to express numbers Example: 2,623,684,608,000 Uses commas to separate values Expanded Form: A sum that shows the place and value of each digit in the number Example: 6000 + 500 + 40 + 2

5. 2,000,000,000,000 + 623,000,000,000 + 684,000,000 + 608,000 2,623,684,608,000 2 Trillion 623 Billion 684 Million 608 Thousand Two Trillion, six hundred twenty-three billion, six hundred eighty-four million, six hundred eight thousand

6. Use to complete 995 998 998995 995 is on the left of 998 on the number line above So, 995 < 998

7. Write in order from least to greatest: 9,797; 9,987; 9,789 9,797 9,987 9,789 The first digit is the same 9 is the largest digit so 9,987 is the largest number Compare the tens digit in the remaining numbers. 9 is greater than 8, so 9,797 is the next largest number The order from least to greatest is: 9,789; 9,797; 9,987