Unit 2 Review

Unit 2 Review

Adding and subtracting whole numbers and decimals

• LINE UP THE DECIMALS

• Remember to fill in the blank spaces with zeros

• Read the problem CAREFULLY

• EACH means that you have to add more than once on one of your numbers

• TAKE YOUR TIME

Multiple Choice

Ethan has 3 skateboards. The blue skateboard measures 63.13 cm., the red one is 54.13 cm long, and the green one is 45.3 cm long. What is the difference between the green and the red skateboard?

• 8.73

• 8.83

• 162.56

• 117.26

Multiple Choice

Margarita paid $42.28 for 3 dolls. She paid $12.2 for the 1st doll and 20 dollars for the second doll. How much did she pay for the 3rd one?

• 30.08

• 10.08

• 11.48

• 50.08

Rounding

• 4 or less, let it rest

• 5 or more up the score

• underline the desired place, circle the number behind it.

• follow the rules. Everything behind the underline number changes to a zero

• Front load rounding is used when there is no specific place to round to

• When we front load round, we underline the first number and round to that place.

Multiple Choice

Mars is the fourth planet in the solar system. If orbits the sun at an average rate of 53,859 miles per hour. Round this number to the nearest thousand.

• 3,000

• 4,000

• 53,000

• 54,000

Multiple Choice

Madison was playing fruit ninja. She earned 423 points in her first round and 245 points in her second round. About how many more points did she earn in her first rounds?

• 200

• 178

• 300

• 100

Multiple Choice

Keith was playing Plants vs. Zombies. His Peashooters shot 512 times on the first round and 987 on the second round. What is the approximate difference in peas shot?

• 475

• 600

• 500

• 400

Multiple Choice

Willy collected 3,542 pop tops from aluminum cans. Round this number to the nearest thousand.

• 3,000

• 4,000

• 3,500

• Not here

Banks and Profit

• Banks lend money out for things like houses, cars, and personal loans

• Banks keep money SAFE

• Profit= Income- expense