Adding And Subtracting Fractions
- 1. Adding and Subtracting Fractions Criss-Cross Smiley Face Method by Mr. Hoover Click to begin
- 2. Adding and Subtracting Positive and Negative Numbers Signs are the same: add the numbers and keep the sign. 2 + 3 = 5 -2 – 3 = -5 -2 + -3 = -5 Signs are opposite: subtract the numbers and take the sign of the larger number. 8 – 5 = 3 (8-5 is 3, and the sign of the larger number is positive) 5 – 8 = -3 (8-5 is 3, and the sign of the larger number is negative) Click to continue Skills Review
- 3. Skills Review Multiplying Positive and Negative Numbers Signs are the same: the sign of the answer will be positive. 4 x 5 = 20 -4 x -5 = 20 Signs are opposite: the sign of the answer will be negative. 4 x -5 = -20 -4 x 5 = -20 Click to continue
- 4. Skills Review Adding, Subtracting, and Multiplying Positive and Negative Numbers Click on the correct answer. 5 + 2 = 0 1 2 3 4 5 6 8 9 10 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 7
- 5. Skills Review Adding, Subtracting, and Multiplying Positive and Negative Numbers Click on the correct answer. 5 – 2 0 1 2 7 4 5 6 8 9 10 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 3
- 6. Skills Review Adding, Subtracting, and Multiplying Positive and Negative Numbers Click on the correct answer. - 5 + 2 = 0 1 2 3 4 5 6 8 9 10 -1 -2 7 -4 -5 -6 -7 -8 -9 -10 -3
- 7. Skills Review Adding, Subtracting, and Multiplying Positive and Negative Numbers Click on the correct answer. - 5 – 2 = 0 1 2 7 4 5 6 8 9 10 -1 -2 -3 -4 -5 -6 3 -8 -9 -10 -7
- 8. You are correct! Go on to the next question.
- 9. You are correct! Go on to the next question.
- 10. You are correct! Go on to the next question.
- 11. You are correct! Move on to the next section.
- 12. Criss-Cross Smiley Face Method Click to continue 2 + 3 = 5 4 Step 1: Criss – multiply 2 x 4 and bring down + sign Step 2: Cross – multiply 3 x 5 Step 3: Smiley Face – multiply 5 x 4 Step 4: Solve and simplify if needed. Leave fraction as an improper fraction. 2 x 4 8 + 20 5 x 4 3 x 5 15 23 = 20
- 13. Criss-Cross Smiley Face Method Click to continue 1 - 2 = 6 3 Step 1: Criss – multiply 1 x 3 and bring down - sign Step 2: Cross – multiply 2 x 6 Step 3: Smiley Face – multiply 6 x 3 Step 4: Solve and simplify if needed. Leave fraction as an improper fraction. 1 x 3 3 - 18 6 x 3 2 x 6 12 -9 = = 18 -1 2
- 14. Practice Click on the correct answer. Leave fraction as an improper fraction. 1 + 3 = 5 4 OK, let’s practice what we just learned. = ? ? ? ? 4 9 4 20 19 9 19 20
- 15. Practice Click on the correct answer. Leave fraction as an improper fraction. 2 - 2 = 3 5 = ? ? ? ? 0 15 4 15 0 -2 -4 15
- 16. Practice Click on the correct answer. Leave fraction as an improper fraction. 6 + 4 = 7 3 = ? ? ? ? 24 21 46 21 1 1 24 10
- 17. Practice Click on the correct answer. Leave fraction as an improper fraction. 7 - 1 = 5 6 = ? ? ? ? 6 11 47 11 37 30 1 5
- 18. You are correct! Go on to the next question.
- 19. You are correct! Go on to the next question.
- 20. You are correct! Go on to the next question.
- 21. You are correct! Congratulations! You have completed the last question! THE END
- 22. Sorry, that’s not correct. Try again!