Multiply Decimals
ESSENTIAL QUESTION
How is multiplying and
decimals similar to
multiplying whole
numbers?
Slide 2: Essential Question
Quick Check
Multiply.
1. 8 × 0.3 =
2. 4 × 2.19=
3. 0.75 × 6=
4. 2.8 × 12=
Slide 5: Quick Check Exercises 1-4
INVESTIGATE the Math
Model
Complete the pattern. Explain your findings.
14× 2 =
14× 0.2 =
14× 0.02 =
14× 0.002 =
Slide 12:Investigate the Math-Model
INVESTIGATE the Math
Model
Complete the pattern. Explain your findings.
14 × 2 = 28
14 × 0.2 = 2.8
14 × 0.02 = 0.28
14× 0.002 = 0.028
Slide 13:Investigate the Math-ModelAnswers
INVESTIGATE the Math
Model
Match each product to its factors.Then rewrite the product
with the decimal point in the correct place.
12.4 × 0.19
696
3.26 × 4.3
14018
5.8 × 1.2
2356
0.05 × 0.25
00125
Slide 14:Investigate the Math-Model
INVESTIGATE the Math
Model
Match each product to its factors.Then rewrite the product
with the decimal point in the correct place.
12.4 × 0.19
696
6.96
3.26 × 4.3
14018
14.018
5.8 × 1.2
2356
2.356
00125
0.0125
0.05 × 0.25
Slide 15:Investigate the Math-ModelAnswers
Guided Practice
Multiply.
1. 0.6 × 0.8 =
2. 1.7 × 2.4 =
3. 0.9 × 3.8=
Slide 26: Guided Practice Exercises 1-3
Guided Practice
Multiply.
1. 0.6 × 0.8 =
2. 1.7 × 2.4 =
3. 0.9 × 3.8 =
0.48
4.08
3.42
Slide 27: Guided Practice Exercises 1-3Answers
Independent Practice
Multiply. Check for reasonableness.
4.
0.96
× 7.1
5.
3.65
× 2.6
6.
0.07
× 5.2
Slide 29: Independent Practice Exercises 4-6
Independent Practice
Multiply. Check for reasonableness.
4.
0.96
× 7.1
6.816
5.
3.65
× 2.6
9.49
6.
0.07
× 5.2
0.364
Slide 30: Independent Practice Exercises 4-6 Answers