Chapter 3-Add and Subtract Decimals

Chapter 3-Add and Subtract Decimals

5th Grade

Place Value

• Numbers in front of the decimal are WHOLE numbers.

• Numbers after the decimals are NOT WHOLE numbers.

Multiple Choice

Which number is in the tenth's place?

3.187

• 3

• 1

• 8

• 7

Multiple Choice

Which number is in the ones place?

27.849

• 2

• 9

• 7

• 8

Multiple Choice

Which number is in the hundredth's place?

267.259

• 2

• 9

• 7

• 5

Multiple Choice

Which number is written in expanded form?

• 3.289

• 3X1 + 2X(1/10 ) + 8X(1/100) + 9X(1/1,000)

• Three and two hundred eighty-nine thousandths

Multiple Choice

Which number is in written form?

• thirty five and eight hundredths

• 35.08

Comparing and Ordering Decimals

• Look at each place value and compare the numbers in those place values.

Multiple Choice

Compare the decimals.
3.21 (  ) 3.23

• >

• <

• =

Multiple Choice

Compare the decimals.

14.34 ( ) 15.32

• <

• >

• =

Multiple Choice

Which shows the decimals ordered from least to greatest?

• 6.29, 6.21, 4.32

• 7.22, 9.03, 8.1

• 3.01, 3.45, 3.7

Multiple Choice

Compare the decimals.

9.23 ( ) 9.230

• <

• >

• =

Rounding Decimals

• Underline the place value that you are rounding to.

• "Go next door"

• If the neighbor is 5 or more, the underlined number is bumped up by one. ALL NUMBERS AFTER THE UNDERLINED NUMBER BECOME ZEROS.

• If the neighbor is 4 or less, the underlined number stays the same. ALL NUMBERS AFTER THE UNDERLINED NUMBER BECOME ZEROS.

• All numbers in front of the underlined number stay the same.

Multiple Choice

Round the number to the nearest whole number.

17.983

• 18

• 18.983

• 17

• 17.0

Multiple Choice

Round the number to the nearest tenth's place.

218.843

• 219

• 218.800

• 218.840

• 217

Multiple Choice

Round the number to the nearest hundredths place.

87.435

• 87

• 87.400

• 87.436

• 87.440

Adding and Subtracting Decimals

Multiple Choice

4.45-1.86=

• 2.63

• 1.45

• 6.3

• 2.59

Multiple Choice

13.2-8.04=

• 21.56

• 5.9

• 5.16

• 8

Multiple Choice

15.76+8.2=

• 23.96

• 7.03

• 22.34

• 13.015

Multiple Choice

27.58+83.9=

• 100.2

• 103.302

• 111.48

• 2