Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction Copyright © 2011 Kelly Mott
Lesson Components: Part 1: Math Boxes 4.4 Page 90 Part 2: Review Part 3: PowerPoint Lesson Part 4: Math Journal Page 88 Part 5: Math Journal Page 89 Part 6: Additional Sheets Add and Subtract Decimals Sheet Math Masters Page 54 Copyright © 2011 Kelly Mott
Math Boxes Lesson 4.4 Page 90 Copyright © 2010 Kelly Mott
Math Box 1: Copyright © 2010 Kelly Mott
Math Box 2: Copyright © 2010 Kelly Mott
Math Box 3: Copyright © 2010 Kelly Mott
Math Box 4: Copyright © 2010 Kelly Mott
Math Box 5: Copyright © 2010 Kelly Mott
Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction Copyright © 2011 Kelly Mott
PART 1: REVIEW Copyright © 2011 Kelly Mott 11
Place Value When we write numbers, the position or “place” of each number is important. Copyright © 2011 Kelly Mott
= .3 or 10 The Tenths Place The first place to the right of the decimal represents the tenths place. EXAMPLE: 3 10 = .3 or Copyright © 2011 Kelly Mott
= or The Tenths Place Let’s Practice. Write the decimal and the fraction for each. = or Copyright © 2011 Kelly Mott
.26 or = 100 The Hundredths Place The second place to the right of the decimal represents the hundredths place. 26 100 .26 or = Copyright © 2011 Kelly Mott
= or The Hundredths Place Let’s Practice. Write the decimal and the fraction for each. = or Copyright © 2011 Kelly Mott
Mixed Numbers A mixed number is a whole number and a fraction or a part of a whole. 8 10 2.8 or 2 Copyright © 2011 Kelly Mott
Mixed Numbers or Copyright © 2011 Kelly Mott
Mixed Numbers or Copyright © 2011 Kelly Mott
Write the Decimal 5 tenths 50 hundredths Copyright © 2011 Kelly Mott
Write the Decimal 7 hundredths 6 tenths Copyright © 2011 Kelly Mott
Comparing Decimals When we compare numbers, we often use symbols. Copyright © 2011 Kelly Mott
Comparing Decimals When comparing numbers, think of Pac Man or an alligator. They EAT the BIGGER number. Copyright © 2011 Kelly Mott
Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott
Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott
Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott
Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott
Compare ( > < =) .3 .13 .06 .4 . . H Tens Ones Tenths Hundredths H Tens Ones Tenths Hundredths . . . . Copyright © 2011 Kelly Mott
Compare ( > < =) .53 .35 .7 .70 . . H Tens Ones Tenths Hundredths H Tens Ones Tenths Hundredths . . . . Copyright © 2011 Kelly Mott
ORDER: LEAST TO GREATEST Line up the numbers. Then put them in order. Cross out the numbers as you go. Now put them in order from least to greatest: ________ ________ ________ ________ ________ . H Tens Ones Tenths Hundredths Order these numbers: 0.04, 0.4, 0.44, 4.4 . . . . Copyright © 2011 Kelly Mott
ORDER: GREATEST TO LEAST Line up the numbers. Then put them in order. Cross out the numbers as you go. Now put them in order from greatest to least: ________ ________ ________ ________ ________ . H Tens Ones Tenths Hundredths Order these numbers: 0.02, 0.20, 0.22, 2.02 . . . . Copyright © 2011 Kelly Mott
PART 2: ADD DECIMALS Copyright © 2011 Kelly Mott 33
ADDING DECIMALS 1 2.78 9.10 3.36 8.49 + + Copyright © 2011 Kelly Mott
ADDING DECIMALS 2 96.45 23.96 21.06 19.49 + + Copyright © 2011 Kelly Mott
PART 3: SUBTRACT DECIMALS Copyright © 2011 Kelly Mott 36
SUBTRACT DECIMALS 1 9.87 4.69 0.40 0.37 - - Copyright © 2011 Kelly Mott
SUBTRACT DECIMALS 2 13.62 4.90 29.40 25.60 - - Copyright © 2011 Kelly Mott
PART 4: ADD THREE DECIMALS Copyright © 2011 Kelly Mott 39
ADDING DECIMALS 1 11.17 7.60 12.03 2.78 8.42 15.01 + + + Copyright © 2011 Kelly Mott
PART 5: SOLVE & COMPARE ( > < =) Copyright © 2011 Kelly Mott 41
SOLVE & COMPARE ( > < =) PRACTICE 1: 2.78 + 9.1 3.36 +8.49 PRACTICE 2: 0.08 + 0.97 1.04 + 0.03 = Copyright © 2011 Kelly Mott
SOLVE & COMPARE ( > < =) PRACTICE 3: 13.62 – 4.9 9.4 – 1.33 PRACTICE 4: 9.4 – 5.6 8.3 – 4.7 = Copyright © 2011 Kelly Mott
PART 5: http://www.ixl.com/ Copyright © 2011 Kelly Mott 44
Does this make sense? Copyright © 2011 Kelly Mott
a Copyright © 2011 Kelly Mott
Copyright © 2010 Kelly Mott
HOMEWORK Page 88 Copyright © 2011 Kelly Mott
HOMEWORK Page 89 Copyright © 2011 Kelly Mott
Adding and Subtracting Decimals Worksheet HOMEWORK Adding and Subtracting Decimals Worksheet Copyright © 2011 Kelly Mott
HOMEWORK Math Masters Page 54 Copyright © 2011 Kelly Mott