Chapter2 : Addition and Subtraction

What is the estimate for 71,078+ 18,805 when each number is rounded to the nearest ten thousand?

• 75,000

• 90,000

• 80,000

• 50,000

10,000 = 2,810 + -------------

• 7,290

• 12,810

• 8,290

• 7,190

20,000 - 672 = --------------

• 19,328

• 13,218

• 19,438

• 20,672

40,891 + 8,510 = --------------

• 32,381

• 48,301

• 49,401

• 48,401

3,812 - 2,999 = ----------------

• 821

• 813

• 1,821

• 6,820

65,300−49 = -----------------

238,070 + 43,878 =

85,208 − _____________ = 78,172

A farmer sold 4,216 chicken eggs and 695 duck eggs last year. How many eggs did he sell altogether?

Laila bought a scooter for $1,250 She also bought a helmet that cost $1,125 less than the scooter. How much did she pay for the scooter and the helmet altogether?

$ ______________