6th Grade Math Textbook, Fundamentals

XIII.Multiply Decimals

To multiply a decimalby a whole number or another decimal:

• Multiply as you would with whole numbers.


• Count the number of decimal places in both factors.


• Mark off the samenumber of decimal places in the product.

Multiply: 11 0.31

Estimate: 10 0.3  3

Compute:

618 3 3 9 0 4 ,

5 4 R532

 3090

3004

 2472

532

XII.Divide Whole Numbers

To divide by a 1-digit number, you can use short division.

• Divide to find the first digit of the quotient.


• Multiply and subtract mentally.


• Write each remainder in front of the next digit in
  the dividend.


• Repeat the steps until the division is completed.

To divide by a 2- or 3-digit number:

• Decide where to begin the quotient. If there are not enough hundreds,
  the quotient begins in the tens place. Divide the tens and ones.

Find the quotient: 33,904  618

Practice Exercises

412 Skills Update

8

8056

 64448 ,^44

2 decimal places

Divide: 64,448  8

Estimate: 64,000  8  8000

Compute:

600 36000 ,

60 estimated quotient

0.31

11

31

 31

3.41

2 decimal places

5 decimal places

3 decimal places

Find the product: 0.42 0.329

Estimate: 0.4 0.3 0.12

Compute: 0.329

0.42

658

 1316

0.13818

Sometimes you will need to write

one or more zeros in the product.

2 decimal places

5 decimal places

0.425 3 decimal places

0.02

0.00 850