Place Value & Rounding
What is 1 meter written in centimeters?
100 cm
Which digit is in the ten-thousands place in 71,090?
ten-thousands digit: 7
Compute: 154,852 + 382,617 (find the sum)
537,469
Draw or describe a model to show that 20 is 4 times as much as 5.
Model: 4 groups of 5; or array 4 × 5 = 20
A local library has 4,383 fiction books and 2,019 non-fiction books. How many total books does the library have?
6,402 books
Complete: 3 meters = ___ centimeters
300 cm
Which number has the expanded form (7 × 10,000) + (1 × 100) + (9 × 10)?
70,190
982,743 − 528,146 (find the difference)
454,597
Fill in the blank: 18 = 6 × 3. 18 is ___ times as much as 3.
18 is 6 times as much as 3
OR 18 is 3 times as much as 6
An art dealer bought a vintage painting for $6,892 and sold it for $8,210. How much profit did the art dealer make?
$1,318
Round 254,479 to the nearest hundred thousand
300,000
Write the following number in expanded form: 16,807
10,000 + 6,000 + 800 + 7
Add: 154,852 + 382,617; then estimate the sum by rounding each addend to the nearest thousand. Which estimate is closest?
Sum = 537,469; estimate by rounding to nearest thousand: 155,000 + 383,000 = 538,000 (close)
Write a different true statement (other than 18 = 6 × 3) that shows multiplicative comparison using 18, 6, and 3.
3 x 6 = 18 (Communative Property)
6,454 fans
Round 254,479 to the nearest thousand.
254,000
Compare: 985,160 ☐ 958,160. Write >, =, or <
>
Subtract using reasoning: If 982,743 − 528,000 = 454,743, what extra subtraction remains to get 982,743 − 528,146?
Need to subtract the extra 146 in 538,146.
Zara reads 7 pages. David reads 2 times as many pages as Zara. How many pages does David read?
David reads 14 pages.
An airline pilot needs to fly a total of 9,500 miles this month to reach her bonus goal. So far, she has flown 3,685 miles on domestic routes and 4,120 miles on international routes. How many more miles does she need to fly to hit her goal?
1,695 miles.
Round 254,479 to the nearest hundred and explain which digit you used to decide.
254,400 (explain: look at tens digit 7 → round hundreds place up)
400,078 ☐ 407,008. Explain why using place value.
< because 400,078 has 400 thousands, 407,008 has 407 thousands
Show a quick method (explain steps) to add or subtract these large numbers accurately and check your work.
Use standard algorithm and check by estimating and column addition/subtraction.
Zara reads 7 pages. David reads 2 times as many pages as Zara. Pablo reads 3 fewer pages than David. How many pages does Pablo read? Show the equation you used.
David reads 14; Pablo reads 14 − 3 = 11 pages. Equation: 7 × 2 − 3 = 11.
A toy store ordered 5,420 stuffed animals for the holiday season. In November, they sold 2,150 of them. In December, they received an extra shipment of 1,850 more stuffed animals. How many stuffed animals does the store have left?
5,120 Stuffed Animals