Addition
Subtraction
Subtract Across Zeros
Estimate Sums and Differences
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

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

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