By Jaydin Winzenburg and Denali Whitted

Review words and prerequisite skills  Millimeter  Centimeter  Meter  Number line  Round  Sum  Difference Round numbers to the nearest place value, graph numbers on a number line, and estimate the sum and difference.

Lesson 3.1 Decimal and place value VocabularyContent Review  DecimalsThis lesson tells you about the three different place values tenths, hundredths, and thousandths Model Problem: =

Lesson 3.2 Measuring metric lengths VocabularyReview the Content  Millimeter  Centimeter  Meter A metric ruler you can use to millimeters is 2 tenths centimeters. The length is about 3 and 2 tenths centimeters. Model Problem: 1 mm= 0.1 cm1 cm= 10 mm 1 mm= m1 cm= 0.01 m 1 m= 1,000 mm 1m= 100 cm 1m= km

Lesson 3.3 Ordering decimals VocabularyReview the Content  Number lineWhen you graph decimals on a number line to compare them, the greater number is farther right. You can also compare decimals by looking at the place value. Model Problem: ? =

Lesson 3.4 Rounding decimals VocabularyReview the Content  Leading digit  Place value  Round To round a decimal to a given place value, look at the digit in the place value to the right. Model Problem:  3.23=

Lesson 3.5 Decimal estimation VocabularyReview the Content  Front-end estimationYou can also estimate sums using front-end estimation. You add the front-end digits to get the low estimate. Then you use the remaining digits to adjust the sum to get a closer estimate. Model Problem: $1.79$1.79 $2.18$2.18 $3.34$3.34 $3.65$3.65= $9.00$2.00

Lesson 3.6 Adding and subtracting decimals VocabularyReview and Content  Commutative property of addition  Associative property of addition To add and subtract decimals, line up the decimal points. Add or subtract as with whole numbers and bring down the decimal point. Model Problem: = =

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