Whole Number and Decimal Number Sense

Place Value

100

Write in standard form:

two thousand, twenty-four and six tenths

2,024.6

200

Write in expanded form:

471.08

400 + 70 + 1 + .08

300

Write the word form:

87.32

eighty-seven and thirty-two hundredths

400

What is the mystery number?

I have a 5 in the tenths place

I have a 6 in the ones place

I have an 8 in the hundredths place

I have a 4 in the tens place

46.58

500

Write the following in standard form.

Three hundred four and five hundredths.

304.05

Rounding Decimals and Powers of 10

100

What is 352 * 10⁴?

3,520,000

200

What is 90 * 10²?

9,000

300

Round 15.688 to the nearest whole number.

16

400

Round 1,343.144 to the nearest hundredths place.

1,343.14

500

Round 765.98 to the nearest tenths place.

766 or 766.0

Comparing and Ordering Decimals

100

Compare the following decimals with <, >, or =.

86.6 _____ 86.66

86.6   <  86.66

200

Compare the following decimals with <, >, or =.

705.558 _____ 705.55

705.558   >  705.55

300

Order the following decimals from least to greatest.

6.7 ; 6.07; 6.77

6.07 ; 6.7 ; 6.77

400

Order the following decimals from greatest to least.

29.35 ;  29.357 ;  29.3

29.357 ; 29.35 ; 29.3

500

Sam thinks that 99.905 is equal to 99.95.  Elisabeth thinks that 99.905 is greater than 99.95.  Anushka thinks that they are both incorrect.  Who do you agree with and why?

Anushka; 99.95 has the greatest value because 5 hundredths are greater than 0 hundredths.

Adding and Subtracting Decimals

100

16.7 - 3.92 = ?

12.78

200

4.99 + 0.43 = ?

5.42

300

9 - 1.54 = ?

7.46

400

623.86 + 148.5 = ?

772.36

500

7.86 + 2.95 + 1.2 = ?

12.01

Number Stories

100

Corbin is making a giant pot of chili.  He needs 4.5 pounds of red peppers and 4.9 pounds of spicy peppers.  How many peppers does he need for his chili?

9.4 pounds

200

Jackson works at his uncle's car wash.  On Friday, he worked 4 hours.  On Saturday, he worked 8.25 hours.  On Sunday, he worked 6.5 hours.  How many total hours did he work?

18.75 hours

300

Livia is working on a science project.  Plant A needs 11.2 hours of light per day.  Plant B needs 6.357 hours of light per day.  How much more light does Plant A need?

4.843 hours

400

Raj is giving his dogs their daily medicine.  Big Spud needs 2.25 mm of medicine.  Tator Tot needs 1.8 mm of medicine.  French Fry needs 3.72 mm of medicine.  How much medicine does Raj give out per day?

7.77 mm of medicine

500

Travis went to Fuzzywigs candy store and spent $6.07 on chocolates.  If Travis paid with a $20 bill,  how much change did he receive?  

$13.93