Grade 4 Fractions

1. Grade 4 MathGrade 4 Math
FractionsFractions

2. Our lessons today…Our lessons today…
Adding FractionsAdding Fractions
Subtracting FractionsSubtracting Fractions
Multiplying FractionsMultiplying Fractions

4. Adding FractionsAdding Fractions
There are 3 Simple Steps to add fractions: There are 3 Simple Steps to add fractions:
Step 1:Step 1: Make sure the bottom numbers (the Make sure the bottom numbers (the
denominators) are the same denominators) are the same
Step 2:Step 2: Add the top numbers (the numerators). Add the top numbers (the numerators).
Put the answer over the same denominator. Put the answer over the same denominator.
Step 3:Step 3: Simplify the fraction (if needed). Simplify the fraction (if needed).

6. Subtracting FractionsSubtracting Fractions
There are 3 simple steps to subtract There are 3 simple steps to subtract
fractions fractions
Step 1. Make sure the bottom numbers (the Step 1. Make sure the bottom numbers (the
denominators) are the same denominators) are the same
Step 2. Subtract the top numbers (the Step 2. Subtract the top numbers (the
numerators). Put the answer over the same numerators). Put the answer over the same
denominator. denominator.

Step 3. Simplify the fraction.Step 3. Simplify the fraction.

9. Multiplying FractionsMultiplying Fractions
One of the biggest mistakes students One of the biggest mistakes students
make when multiplying fractions is that make when multiplying fractions is that
they cross-multiply!they cross-multiply!

10. The trick is….The trick is….
Students…remember to multiply ACROSS!Students…remember to multiply ACROSS!

11. Some Questions to work on.Some Questions to work on.
1. How many minutes in 1/2 an hour? 1. How many minutes in 1/2 an hour?
2. How many minutes in 1/4 of an hour?2. How many minutes in 1/4 of an hour?
3. What is 1/2 of 12?3. What is 1/2 of 12?
4. What is 1/2 of 1/44. What is 1/2 of 1/4
5. Write a fraction larger than 1/2 but 5. Write a fraction larger than 1/2 but
smaller than 1smaller than 1