Addition
Subtraction
More Subtraction
Estimate Sums and Differences
Vocabulary
100

What is 3,567 + 2,341 =? 

5,908

100

What is 394 - 75=?

319

100

What is 1,902 - 1,374?

528

100

Estimate the difference by rounding to the nearest ten thousand 

 651,354 - 417,823=?

650,000 - 420,000 = 230,000

100

What is the answer to an addition problem called?

Sum

200

What is 32,602 + 53,129 =?

85,731

200

What is 5,296 - 4,521=?

775

200

What is 80,600 - 16,434=?

64,166

200

Estimate the sum by rounding to the nearest thousand 45,671 + 7,142

46,000 + 7,000 = 53,000

200

What is the answer to a subtraction problem called

Difference

300

What is 19,634+13,768+7,926=?

41,328

300

A crayon company makes 36,742 red crayons, 12,345 yellow crayons, and 6,921 brown crayons. How many more red crayons are made than yellow and brown combined? (Hint: you must use two operations)

17,467

300

What is 800,740 - 201,568=?

599,172

300

Estimate the difference by rounding to the nearest ten thousand 1,000,000 - 348,546=?

1,000,000 - 350,000= 650,000

300

Two numbers being added together are called what?

Addends

400

Jake had 3,456 Pokemon cards and 15,324 baseball cards. How many cards does Jake have altogether? 

18,780

400

The Cycling Club's goal is to ride 8,213 miles by the end of four months. How many more miles do they need to ride in July to meet their goal? 

2,796

400

A gym hold a fundraiser over four weekends in which a team runs laps for donations. The gym's goal is 50,000 laps. Over three weekends the teams ran 9,328 laps, 14,054 laps, and 7,492 laps. How many laps do they need to run the fourth weekend to reach their goal? 

19,216

400

About how much greater is the area of the largest sea than the area of the smallest sea? Estimate the difference by rounding to the nearest thousand. 

The largest sea is Caprian Sea and that rounds to 168,000 and the smallest sea is the Boravian Sea which rounds to 14,000 so the estimated difference is 154,000. 

400

What is one math strategy (besides standard algorithm) you can use to solve an addition or subtraction problem. 

Counting on, think addition, partial sums, count back.

500

     68X1

   +3463 

    10334

Find what number is represented by X

What is 7

500

Denise wrote the subtraction below. What mistake did Denise make? What is the correct answer? 

Denise did not regroup correctly in the thousands digit, the answer is 237,932

500

Mary subtracted 502,600 from 164,317. Is Mary's answer correct If not, explain why and what is the correct answer? 

Mary's answer is not correct, she did not regroup correctly in the hundred thousands place. The correct answer is 338,283. 

500

The fourth graders sang on a 2-day telethon for the local children's hospital. The hospital hoped to raise 760,000. On day one, they raised $398,139. On day two they raised $367,173. Did they reach their goal? About how much more or less did they raise. Estimate by rounding to the nearest ten thousand. 

Yes they did meet their goal because they raised $771,312. They raised about 10,000 more than their goal because $771,312 rounds to $770,000 and their goal was $760,000. 

500

What is an algorithm?

The steps you take to solve a problem.