Decimals
+ and - W and D
Rounding
Estimating
Power of 10
100

In word for this number is two hundredths.

What is .02?

100

The answer to 100-74.8=

What is 25.2?

100
13,452 rounded to the nearest hundred.

What is 13,500?

100

604-251=
Rounded to the nearest hundred

What is about 300?

100

23 x 10 =

What is 230?

200

In expanded notation this number is 

(4x100)+(3x10)+(1x1)+(8x0.1)+(7x0.01)

What is 431.87?

200

24.01+43.2=

What is 67.21?

200

145,320 rounded to the nearest thousand.

What is 145,000?

200

343+420 rounded to the nearest hundred?

What is about 700?

200

56 x 100

What is 5,600?

300

In expanded form this number is 

7000+500+30+2+0.6+0.06

What is 7532.66

300

Jimmy has $5.35. Timmy has $3.45. How much money do they have together?

What is $8.80?

300

495,300 rounded to the nearest ten thousand.

What is 500,000?

300

Mr. Navarro sells gems. He finds a diamond in Paris and buys it for $1,584. Then, he flies to London and purchases a bigger diamond for the bargain price of $779. About how much does Mr. Navarro spend on the two diamonds?

What is about $2,400?

300

Ned has 30 friends on Facebook. His brother Robert has ten times as many friends. How many friends does Robert have?

What is 300?

400

This number is 483.25 in expanded notation.

What is (4x100)+(8x10)+(3x1)+(2x0.1)+(5x0.01)

400

Bill has 10 dollars. He gives his brother $4.33. How much does he have left?

What is $5.67?

400

Five thousand four hundred sixty rounded to the nearest hundred.

What is 5,500?

400

Two boats were carrying crates of toys from one country to another. One boat carried 528 crates of toys. The other boat carried 371 crates of toys. Together, about how many crates of toys did the two boats carry?

What is about 900?

400

Jenny has 45 people come to her recital. Her dad Mr. Hanks had 100 times as many people show up for his concert the next day. How many showed up for his concert?

What is 4,500 people?

500

This number is 62,541.5 in word form.

What is sixty two thousand five hundred forty one and five tenths?

500

Joe buys two packs of gum for $0.65 each. He also buys a pair of candy bars for $1.25 each. If he gives the cashier $5 how much money will he get back?

What is $1.20?

500

Three hundred forty one thousand two hundred fifty rounded to the ten thousands place.

What is 340,000?

500

When Cora went to bed, there were 197 gulls on the lake. That night, a flock of 710 geese joined them. About how many birds were on the lake when Cora woke up?

What is about 900?

500

Saul has 10 times as many pokemon cards as Kim. Kim has 10 times as many pokemon cards as Joe. Joe has 30 pokemon cards. How many pokemon cards does Saul have?

What is 3,000?