# Today we will review “Multiplying & Dividing Decimals”

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Today we will review “Multiplying & Dividing Decimals”
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Let’s Warm up:. 1) = 0.7 2) 3.5 – 1.2 =2.3 3) – 0.1 =0.8 4) 6.5 – =4.9 CONFIDENTIAL

Multiplying 2 Decimal places by Whole Numbers
When multiplying a decimal by a whole number, multiply as with whole numbers Then count the number of decimal places in the factors Starting at the right, put that many places in the answer CONFIDENTIAL

Multiplying 2 Decimal places by Whole Numbers
Example: Find 4.04 x 3 Method: Count decimal places 4.04 x 3 12.12 There are two places to the right of the decimal point. Count the same number of places from right to left. CONFIDENTIAL

Multiplying 2 Decimal places by Whole Numbers
Your turn! Find 2.34 x 8 18.72 CONFIDENTIAL

Multiplying 2 Decimal places by Whole Numbers
Your turn! Find 9.76 x 5 48.80 CONFIDENTIAL

Dividing 2 Decimal places by Whole Numbers
Dividing a decimal by a whole number is similar to dividing whole numbers CONFIDENTIAL

Dividing 2 Decimal places by Whole Numbers
Divide a decimal by a 1-Digit Number Find 6.08 ÷ 2. CONFIDENTIAL

Dividing 2 Decimal places by Whole Numbers
Your turn! Find 3.48 ÷ 4 0.87 CONFIDENTIAL

Dividing 2 Decimal places by Whole Numbers
Your turn! Find 6.78 ÷ 3 2.26 CONFIDENTIAL

Dividing with Decimal Remainders
Usually, when you divide, the answer does not come out evenly and you have a remainder You need to put a decimal and annex zero Then continue dividing till you get zero remainder CONFIDENTIAL

Dividing with Decimal Remainders
Example: Divide 22 by 4 Place the decimal point Annex zero Divide as with whole numbers Divide until you get zero remainder CONFIDENTIAL

Dividing with Decimal Remainders
Your Turn! Divide 33 by 5 6.6 CONFIDENTIAL

Dividing with Decimal Remainders
Your Turn! Divide 65 by 8 8.125 CONFIDENTIAL

Converting Decimals to Fractions
Use models This model shows 1 This model shows 1 divided into 100 equal parts. The shaded portion shows 1/100. It can be written as 0.01 This model shows 1 divided into 10 equal parts. The shaded portion shows 1/10. It can be written as 0.1 CONFIDENTIAL

Converting Decimals to Fractions
Example: This model shows 1 divided into 100 equal parts. The shaded portion shows 70/100. It can be written as 0.70 CONFIDENTIAL

Converting Decimals to Fractions
Your Turn! Write a fraction for this decimal: 0.67; Use model This model shows 1 divided into 100 equal parts. The shaded portion shows 67/100. CONFIDENTIAL

Converting Decimals to Fractions
Your Turn! Write a fraction for this decimal: 0.45; Use model This model shows 1 divided into 100 equal parts. The shaded portion shows 45/100. CONFIDENTIAL

Converting Fractions to Decimals
Use models to convert fractions to decimals Alternatively; Step 1: Write the decimal as a fraction of 100 Step 2: Write the fraction in the simplest form Example: Write ¾ as a decimal Equivalent fraction is 3 x 25 = 75 4 x 0.75 CONFIDENTIAL

Converting Fractions to Decimals
Your Turn! Write 3/5 as a decimal. 0.6 CONFIDENTIAL

Converting Fractions to Decimals
Your Turn! Write 1/4 as a decimal. 0.25 CONFIDENTIAL

Let us take a break! CONFIDENTIAL

Let us see how fast you are on this one!
Jig-Saw puzzle Let us see how fast you are on this one! Click me CONFIDENTIAL

Assessment 5.01 x 9 = 45.09 6.64 x 7 = 46.48 CONFIDENTIAL

Assessment 5.24 ÷ 2 = 2.62 7.92 ÷ 3 = 2.64 CONFIDENTIAL

Assessment 6 ÷ 4 = 1.5 7 ÷ 2 = 3.5 CONFIDENTIAL

Assessment Write 0.78 as a fraction. = 39/50
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Assessment Write 2/5 as a decimal. =0.4
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Good Job! You have learned a lot today!!! CONFIDENTIAL

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