Show:
Adding Rational Numbers
Subtracting Rational Numbers
Multiplying Rational Numbers
Dividing Rational Numbers
How-To Guide
100
Add:

4.3 + 2.6
6.9
100
Subtract:

5.7 - 9.3
-3.6
100
Multiply:

4.5 x 6
27
100
Divide:

0.5 ÷ 2
0.25
100
Fill in the blank:

"When adding or subtracting decimals, you have to ___________ first.
Line up the decimal points.
200
Add:

1/3 + 5/3
6/3 or 2
200
Subtract:

(-3/5) - 4/5
-7/5
200
Multiply:

2/3 x 7/8
14/24 or 7/12
200
Divide:

-10/11 ÷ 9/11
-10/9 or -1 1/9
200
Fill in the blanks:

To multiply fractions, you _______ and ________.
Multiply the numerators together; multiply the denominators together.
300
Add:

-3/8 + (-3/4)
-9/8 or -1 1/8
300
Subtract:

4/7 - 11/14
-3/14
300
Multiply:

26.5 x (-4.2)
-111.3
300
Divide:

-5/6 ÷ 4/3
-15/24 or -5/8
300
Fill in the blank:

In order to add or subtract fractions, the fractions must have __________.
The same denominator.
400
Add:

2 1/3 + 3 3/4
6 1/12
400
Subtract:

4 1/5 - 1 4/5
2 2/5
400
Multiply:

5 1/2 x 3/4
33/8 or 4 1/8
400
Divide:

6.375 ÷ 25
0.255
400
Fill in the blank:

The numbers 4 and 1/4 are called _____________.
Multiplicative inverses.
500
Add:

-4 1/3 + 2 2/9
-2 1/9
500
Subtract:

-5 1/6 - 3 3/4
-8 11/12
500
Multiply:

-3 5/7 x 1 3/4
-13/2 or -6 1/2
500
Multiply:

(-5 4/7)(3 1/2)
-38/2 or -19
500
Explain how to divide decimals by hand.
Move the decimal point in the dividend and the divisor. Carry the decimal up to the quotient, then divide normally.