Place Value
What is the value of the 7 in 478,213?
70,000 or 7 ten thousands
Write 5,000 + 300 + 9 in standard form.
5,309
Round 4,321 to the nearest hundred.
4,300
Find the sum: 3,215+452.
3,667
Find the difference: 875−342.
533
How many tens are in 600?
60 tens
Write 10,405 in word form.
ten thousand, four hundred five
Round 78,560 to the nearest thousand.
79,000
Find the sum: 12,345+5,789.
18,134
Find the difference: 9,000−4,567.
4,433
What place value is 10 times greater than the ten thousands place?
Hundred thousands place
Write "one hundred sixteen thousand, two" in standard form.
116,002
Round 345,999 to the nearest ten thousand.
350,000
What is the term for combining or grouping 10 smaller units to make 1 larger unit in addition?
Bundling
What is the term for breaking apart a larger unit into 10 smaller units in subtraction?
decompose or unbundle
In the number 22,222, how does the value of the 2 on the left compare to the value of the 2 next to it?
Its value is 10 times less
Write 452,708 in expanded form.
400,000+50,000+2,000+700+8
Round 99,876 to the nearest hundred.
99,900
What should you do to estimate the sum of 5,478+3,121?
Rounding both numbers to a reasonable place value (like the thousands) and then adding (to estimate)?
Explain why you must unbundle a ten when subtracting 23−7.
Because you don't have enough ones to subtract 7 ones, so you decompose 1 ten into 10 ones.
If a digit is moved one place to the right, how does its value change?
The digit becomes ten times LESS
What type of form is a number written out using words, like "five hundred"?
Word form
Explain how the vertical number line helps you decide whether to round up or down.
If the number being rounded is below the halfway point on the number line, you round down; if it is at or above the halfway point, you round up.
What is the first step when adding multi-digit numbers using the standard algorithm?
Add in the ones place.
What is the first step when fluently subtracting multi-digit numbers using the standard algorithm?
checking the ones place to see if you need to unbundle (or checking to see if the top digit is less than the bottom digit)?