Vocabulary
Problem Solving
True or False
Math Talk-No Writing
Standard, Expanded, Word Form
100
Estimate
What is a number close to an exact number?
100
Liz is correct. Possible explanation: Luis left the ten thousands digit the same instead of increasing it by 1. The digit in the thousands place is 5, so to round to the nearest ten thousand, Luis should have increased the ten thousands digit, 3, by 1.
What is Luis and Liz each rounded 635,974 to the nearest ten thousand. Luis wrote 630,000 and Liz wrote 640,000. Who is correct? Explain the error that was made.
100
False. You look to the right of the place.
Rounding a number means looking at the place and going up or down a digit in that place based on the number to the left.
100
950,000 Mental Math Strategy, Break Apart Strategy or Combine Place Values Strategy add 25+25=50 then add 8+1.
During September and October, a total of 825,000 visitors went to Grand Canyon National Park. If 125,000 visitors went to the park in September, how many visitors went to the park in October?
100
400,000 + 90,000 + 7,000 + 200 + 30 + 1
What is 497,231 in expanded form?
200
Expanded Form
What is the way of writing numbers where you show the value of each digit?
200
222,064 people; 543,718 − 321,654 = 222,064; Check students’ work.
What is A total of 543,718 visitors went to a theme park during August and September. If 321,654 visitors went to the theme park in August, how many visitors went to the theme park in September? Show your work.
200
False. Inverse operations undo each other. Addition and subtraction are inverse operations, and multiplication and division are inverse operations.
Addition and multiplication are inverse operations.
200
22 minutes
Aria is going to the park which is 12 minutes from her house. If she stops at Julian's house for 10 minutes on the way, how long does it take her to get to the park?
200
371,999
What is three hundred seventy-one thousand, nine hundred ninety-nine written in standard form?
300
Round
What is to tell about how many?
300
16,185 square miles; 113,998 − 97,813 = 16,185; I estimated the difference as 110,000 − 98,000, or 12,000. The answer is close to the estimate of 12,000, so it is reasonable.
Arizona has a land area of 113,998 square miles. Wyoming has a land area of 97,813 square miles. How much greater is the area, in square miles, of Arizona than the area of Wyoming? Show your work and explain how you know the answer is reasonable.
300
True, a period is a set of three digits in each section of a number.
The place value chart has periods.
300
600+70+8
What is 678 in expanded form?
300
Nine hundred seventy-eight thousand, one hundred seventy-two.
What is 978,172 written in word form?
400
thousands
What is the place value position 10 times as big as the hundreds place.
400
134,589; possible explanation: the 4 represents 4,000 and the 5 represents 500.
What is the least number that can be made using each digit in the number 534,981 exactly once? Explain why the value of the 4 is greater than the value of the 5.
400
False. The 7 in 786,900 has more value and is larger because it is equal to 700,000 and the 7 in 426,780 is equal to 700.
The 7 in 786,900 and the 7 in 426,780 have the same value.
400
100,000+ 20,000 + 9,000 + 10 + 7
What is 129,017 in expanded form?
400
483,489
What is 483,489 written in standard form?
500
Inverse Operations
What is operations that undo each other.
500
Bobby is correct. Possible explanation: Cheryl left the ten thousands digit the same instead of increasing it by 1. The digit in the thousands place is 5, so to round to the nearest ten thousand, Cheryl should have increased the ten thousands digit, 4, by 1.
Bobby and Cheryl each rounded 745,829 to the nearest ten thousand. Bobby wrote 750,000 and Cheryl wrote 740,000. Who is correct? Explain the error that was made.
500
False it is 70,000 because it is in the ten thousands place.
The value of 7 in 375,092 is 7,000.
500
one million, nine hundred eighty-seven thousand, six hundred forty-eight
What is 1,987,648 in word form?
500
1,434,890
What is nine million, four hundred thirty-four thousand, eight hundred ninety written
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