Pre-Algebra Examples

Evaluate 4/15+9/10+11/12
Step 1
Find the common denominator.
Tap for more steps...
Step 1.1
Multiply by .
Step 1.2
Multiply by .
Step 1.3
Multiply by .
Step 1.4
Multiply by .
Step 1.5
Multiply by .
Step 1.6
Multiply by .
Step 1.7
Reorder the factors of .
Step 1.8
Multiply by .
Step 1.9
Reorder the factors of .
Step 1.10
Multiply by .
Step 1.11
Reorder the factors of .
Step 1.12
Multiply by .
Step 2
Combine the numerators over the common denominator.
Step 3
Simplify each term.
Tap for more steps...
Step 3.1
Multiply by .
Step 3.2
Multiply by .
Step 3.3
Multiply by .
Step 4
Reduce the expression by cancelling the common factors.
Tap for more steps...
Step 4.1
Add and .
Step 4.2
Add and .
Step 4.3
Cancel the common factor of and .
Tap for more steps...
Step 4.3.1
Factor out of .
Step 4.3.2
Cancel the common factors.
Tap for more steps...
Step 4.3.2.1
Factor out of .
Step 4.3.2.2
Cancel the common factor.
Step 4.3.2.3
Rewrite the expression.
Step 5
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
Mixed Number Form: