Place Value
What is the value of the underlined digit?
138,754
thirty thousand (30,000)
What are the basic rules for rounding numbers?
4 and below: it stays the same (round down)
5 and up: add one more (round up)
492 + 75 =
567
b + 9,979 = 14,180. Find the value of b
b=4,201
There are 11,500 seats in the basketball arena. For one game, 9,465 seats were filled. How many seats were empty?
2,035 seats were empty
What is the following number in Expanded Form?
5,782
5,000 + 700 + 80 + 2
Round 654,321 to the nearest ten thousands place.
650,000
In an addition problems what are the two numbers that are added called? What about the total?
Two added numbers: addends
Total: sum
708,032 - 239,125 =
708,032 - 239,125 = 468,910
Two years ago, Bob bought a used car that had 14,854 miles on the odometer. Last year, he drove 8,240 miles. This year, he drove 9,273 miles. How many miles does the odometer show now?
32,367 miles
How would the following number change if it had 3 more hundreds?
1,591
The number would increase by 300, becoming 1,891.
Round 789,726 to the nearest thousands.
790,000
8,715 + 6,742 =
15,457
3,000 - 746 =
2,254
Pranav bought a car for $17,067. This price included a leather package for $1,248 and a heated seats for $269. What was the price of the car without these features?
$15,550
Compare the following numbers:
a) 15,681 vs. 15,816
b) 345 vs 200 + 50 + 90 + 5
a) 15, 681 < 15, 816
b) 345 = 200 + 50 + 90 + 5
Find the estimate and the actual answer:
1,236 + 897 =
Estimate: 1,200 + 900 = 2,100
Answer: 2,133
Explain how addition and subtraction are related? How can this relationship be used to check your work?
Addition and subtraction are inverse operations, meaning they are opposites of each other. You can use this relationship to check your work because if it is a subtraction problem, you can "add up" (turn it into an addition problem).
Is the following answer reasonable? Why or why not? What is the answer?
486,247 - 439,508 = 46,739
Ivan scored 12,293 points in a video game. That was 5,536 more than Edwin score on the same game. How many points did Edwin score? How do you know your answer is reasonable?
Edwin scored 6,757 points.
Reasonable because if you estimate the equation to 12,300 - 6,000 = 6,300 which is close to the answer 6,757.
Draw a place value drawing that shows: 3, 729
3 thousand bars
7 hundred boxes
2 quick tens
9 ones
Is the following answer reasonable? Why or why not? What is the actual answer?
1,297 + 812 = 1,749
The answer is unreasonable because if you round the equation to 1,300 + 800, you should get an answer that is about 2,100 and 1,749 is not close to 2,100. The actual answer is 2,109 which is very close to 2,100.
95,436 + 375,599 =
Give two equations you can use to check your answer.
95,436 + 375,599 = 471,035
471,035 - 375,599 = 95,436 and
471,035 - 95,436 = 375,599
800,000 - 1,347 =
What would be an equation you can use to check your answer?
800,000 - 1,347 = 798,653
1,347 + 798,653 = 800,000
Siya paints pictures and sells them at art shows. She charges $1,345 for a large painting. She charges $597 for a small painting. Last month she sold one large painting and two small paintings. How much did she make in all?
In all Siya made $2,539.