Adding &Subtracting

Adding & Subtracting Fractions There will be a slide with a fraction problem Students will hold up their whiteboards with their answers The next slide will contain the answer and steps to work it This is a formative assessment to see how much we know

½ + 2/3

Step 1: 1*3 / 2*3 + 2*2 / 3*2 Step 2: 3 / 6 + 4 / 6 Step 3: 3 + 4 / 6 Answer: 7/6

3/5 +3/8

Step 1: 3*8 / 5*8 + 3*5 / 8*5 Step 2: 24 / 40 + 15 / 40 Step 3: 24 + 15 / 40 Answer: 39/ 40

½ + 8/11

Step 1: 1 * 11 / 2 * 11 + 8 * 2 / 11 * 2 Step 2: 11 / 22 + 16 / 22 Step 3: 11 + 16 / 22 Answer: 27 / 22

8/12 – 1/5

Step 1: 8 * 5 / 12 * 5 – 1 * 12 / 5 * 12 Step 2: 40 / 60 – 12 / 60 Step 3: 40 – 12 / 60 Step 4: 28 / 60 Answer: 7 / 25

2/8 – 1/6

Step 1: 2 * 3 / 8 * 3 – 1 * 4 / 6 * 4 Step 2: 6 / 24 – 4 / 24 Step 3: 6 – 4 / 24 Step 4: 2 / 24 Answer: 1/12

7/11 – 1/3

Step 1: 7 * 3 / 11 * 3 – 1 * 11 / 3 * 11 Step 2: 21 / 33 – 11 / 33 Step 3: 21 – 11 / 33 Answer: 10 / 33

How do you think you did?