Addition
398 + 461 =
859
683 - 295 =
388
Write 8,547 in expanded form
8,000 + 500 + 40 + 7
Round 287 to the nearest hundred and estimate the product for 287 x 6
300 x 6 = 1,800
Find the quotients
45/5
450/5
4,500/5
45/5 = 9
450/5 = 90
4,500/5 = 900
38,911 + 45,681=
84,592
215,714 - 176,313 =
39,401
Mia says in 5,555, all the digits have the same value. Is Mia correct? Explain.
No, Mia is incorrect. All of the 5's in 5,555 have different values because they are in different place-values. 5,50,500,5000
21 becomes 20 and 1
45 becomes 40 and 5
20 x 40=800
20 x 5= 100
40 x 1= 40
1 x 5 = 5
800 + 100 + 40 + 5 = 945
Estimate the quotient
192 / 5
200 / 5 = 400
Round each number to the nearest thousands place and estimate the sum.
14,632 + 11,278
15,000 + 11,000 = 26,000
30,900 - 22,855 =
8,045
40,000 + 2,000 + 600 + 6 ⃝ 40,000 + 3,000 + 10
42,606 < 43,010
Find the products for...
30 x 20
30 x 30
30 x 40
30 x 20 = 600
30 x 30 = 900
30 x 40 = 1,200
55 baseball cards 4 cards on each page. How many cards are on the last page?
55 / 4 = 13 r 3
There are 3 cards on the last page
True or false, the sum of 78,487 + 7,998 is 86,488
False, the correct sum is 86,485
Round each number to the nearest ten-thousand and estimate the difference.
87,633 - 15,899
90,000 - 20,000 = 70,000
Which group of numbers shows the values of the 4s in 44,492?
𝖠 40,000; 4,000; 400
𝖡 40,000; 400; 40
𝖢 4,000; 400; 4
𝖣 400; 40; 4
A: 40,000; 4,000; 400
Use any method to solve for...
79 x 43
3,397
Use partial quotients to divide
450 / 3
3 x 100 = 300
450-300=150
3 x 50 = 150
150-150= 0
100 + 50 = 150
Maria added 45,273 and 35,687 and got a sum of 70,960. Is Maria’s answer correct? If she isn't, what is the correct sum?
Maria isn't correct. The correct sum is 80,960.
Nevada has a land area of 109,781 square miles. Colorado has a land area of 103,642 square miles. How much larger is Nevada's land area than Colorado?
Nevada has 6,139 square miles more of land area than Colorado.
Write four numbers that round to 700,000 when rounded to the nearest hundred thousand.
check answers
Estimate to find the product
28 x 18
30 x 20 = 600
Use any method to divide 5,865/5
1,173