# 6-5 Multiplying and Dividing Decimals by PRmxmv

VIEWS: 12 PAGES: 25

• pg 1
```									6-5 Multiplying and Dividing
Decimals
Objective: Multiply and divide
decimals.
5-Minute Check
1. Name the multiplicative inverse of 12/5.
5-Minute Check
1. Name the multiplicative inverse of 12/5.
5/
7
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½                 -4
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½

3. n = 5/12  7/15
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½

3. n = 5/12  7/15            25/
28
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½

3. n = 5/12  7/15

Evaluate each expression if m = 1/3 and n = -2/9
4. m/n
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½

3. n = 5/12  7/15

Evaluate each expression if m = 1/3 and n = -2/9
4. m/n                       -1½
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½

3. n = 5/12  7/15

Evaluate each expression if m = 1/3 and n = -2/9
4. m/n

5. n/m2
5-Minute Check
1. Name the multiplicative inverse of 12/5.

Estimate the solution to each equation. Then solve. Write
the solution in simplest form.
2. x = -6  1½

3. n = 5/12  7/15

Evaluate each expression if m = 1/3 and n = -2/9
4. m/n

5. n/m2                       -2
6-5 Multiplying and Dividing
Decimals
When multiplying decimals, the number
of decimal places in the product is the
same as the sum of the decimal places in
the factors.
6-5 Multiplying and Dividing
Decimals
Example 1
Solve y = (10.7)(0.13).
10.7              1 decimal place
6-5 Multiplying and Dividing
Decimals
Example 1
Solve y = (10.7)(0.13).
10.7              1 decimal place
x0.13              2 decimal places
6-5 Multiplying and Dividing
Decimals
Example 1
Solve y = (10.7)(0.13).
10.7              1 decimal place
x0.13              2 decimal places
321
6-5 Multiplying and Dividing
Decimals
Example 1
Solve y = (10.7)(0.13).
10.7             1 decimal place
x0.13              2 decimal places
321
1070
6-5 Multiplying and Dividing
Decimals
Example 1
Solve y = (10.7)(0.13).
10.7             1 decimal place
x0.13              2 decimal places
321
1070
1.391             3 decimal places
6-5 Multiplying and Dividing
Decimals
Example 1
Solve y = (10.7)(0.13).
10.7             1 decimal place
x0.13              2 decimal places
321
1070
1.391             3 decimal places
y = 1.391
6-5 Multiplying and Dividing
Decimals
To divide decimals, multiply both the
divisor and the dividend by a power of
ten so that the divisor is a whole
number. Then divide.
6-5 Multiplying and Dividing
Decimals
Example 2
Solve y = 2.25  2.5.
6-5 Multiplying and Dividing
Decimals
Example 2
Solve y = 2.25  2.5.
Estimate: 2  2 = 1
2.5)2.25
6-5 Multiplying and Dividing
Decimals
Example 2
Solve y = 2.25  2.5.
Estimate: 2  2 = 1
2.5)2.25            Multiply by 10 to get a whole number in
the divisor.
6-5 Multiplying and Dividing
Decimals
Example 2
Solve y = 2.25  2.5.
Estimate: 2  2 = 1
2.5)2.25            Multiply by 10 to get a whole number in
the divisor.

0.9
25)22.5            Divide as with whole numbers.
225
6-5 Multiplying and Dividing
Decimals
Example 2
Solve y = 2.25  2.5.
Estimate: 2  2 = 1
2.5)2.25            Multiply by 10 to get a whole number in
the divisor.

0.9
25)22.5            Divide as with whole numbers.
225

x = 0.9            Compare to the estimate.
6-5 Multiplying and Dividing
Decimals
Assignment: 18 – 48 Even, 50 – 62 All.
Page: 298+

```
To top