2Stretch Your Thinking12. Mr. Thomas writes 4,964 on the board. Amy says the value of the underlined digit is 9. Chris said the value is 900. Which student is correct? ExplainChris is correct. The underlined digit is in the hundreds place of the number. So, it has a value of 9 hundreds, or 900.
3Stretch Your ThinkingSara is thinking of a number. When she rounds her number to the nearest hundred she gets 700. What is the greatest number Sara can be thinking of? Explain749; The number 749 rounded to the nearest hundred is 700. The number 750 rounded to the nearest hundred is 800. So, 749 is the greatest number Sara could be thinking of that rounds to 700.
4Stretch Your Thinking17. How many zeros are in the standard from of six hundred thousand, twenty? Explain600,020
5Stretch Your Thinking19. When you round a number, which digit in the number helps you decide to round up or round down? Explain your answer.
6Rounding RulesIf the digit to the right of the rounding place is 5 or more, the digit in the rounding place increases by 1 and the values of the places to the right of the rounding place change to zero.If the digit to the right of the rounding place is less than 5, the digit in the rounding place does not change and the values of the places to the right of the rounding place change to zero.
7Stretch Your Thinking What number does this drawing represent? 1,2841,084What would the number be if you took away 200?
8Stretch Your ThinkingWhat is the pattern? 10x3=30 100x3=300 1,000x3=3,000 What comes next? What’s the pattern?10,00x3=30,000The value of each place is 10 times greater.
9460,53 Stretch Your Thinking Write in expanded form. 400,000+60,
10Stretch Your ThinkingWrite45,039In word form400,000+60,
11Write 300,000+3,000+10+9 In Standard Form Stretch Your ThinkingWrite 300,000+3, In Standard Form303,019
12Stretch Your Thinking25. A number, containing no zeros, changed to 310,000 after it was rounded. To what place was the number rounded? Explain how you know.To the ten thousands place, all of the digits to the right of the ten thousands place are zeros.
13Find the unknown value in the number sentence: 8 x n=56 n= Stretch Your ThinkingFind the unknown value in the number sentence: 8 x n=56 n=N=7
14Classwork: Journal page 14 Homework: page 9Remembering: page 10**(Multiplication group replaces 1-5 of remembering; but does 6-10)