Operations with Fractions and Decimals Add/Sub/Mult/Div

Multiplication rules

1. Put all MIXED NUMBERS in IMPROPER FORM.
2. Reduce all fractions before multiplying
3. Multiply the numerator times the numerator and the denominator times the denominator.

 To Multiply decimals numbers:

Multiply the numbers, then count the number of decimal places.

Division rules

1. CHANGE division sign to a multiplication sign.
2. Write the RECIPROCAL of the divisor (2^nd number).
3. Follow the multiplication rules.

 To DIVIDE decimal numbers:

1. Move the decimal point in the divisor so that it becomes a whole number. 2. Move the decimal point in the dividend the same number of places to the right 3. Divide as if working with whole numbers. Write the decimal point in the answer directly above the decimal point in the dividend.

Addition and subtraction rules

1. Must have a common denominator
2. Add or subtract numerators only
3. Denominator remains the same
4. Reduce to lowest terms
5. When adding or subtracting mixed numbers

a. Add or subtract whole numbers

b. With addition and subtraction extra step (carrying or borrowing) may be needed

c. Answers must always be in lowest terms

Examples:

Examples:

Add the following numbers: 2.046, 0.658 and 1.39.                    

Line up the decimals, fill in any needed zero, and add the columns.

 Subtract the following numbers: 10.8 - 3.52

Line up the decimals, fill in any needed zeros and subtract the columns.

Match the items.

The task is to match the lettered items with the correct numbered items. Appearing below is a list of lettered items. Following that is a list of numbered items. Each numbered item is followed by a drop-down. Select the letter in the drop down that best matches the numbered item with the lettered alternatives.

a.
b. 4.37
c. -3.83
d.
1.	a b c d
2.	a b c d
3.	a b c d
4.	a b c d

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