Learn How to add and subtract fractions using models

Count all to find the sum. When you were little… 10 50 30 55 20 40 53 57 51 52 54 56 23 + 34 = ____ 57 61 and 7/8 Teacher models counting EACH piece ie. 10, 20, 21, 22, 23, 33, 43, 53, 54, 55, …..61 Teacher models counting EACH piece ie. 1/8, 2/8, 3/8, 4/8, 5/8, 6/8

Count all to find the sum. How do you think you can use strategy with fractions? 5 eighths 3 eighths 0 eighths 4 eighths 6 eighths 2 eighths 1 eighths 3 8 + 2 8 + 1 8 = ____ 𝟔 𝟖 6/8 Teacher models counting EACH piece ie. 1/8, 2/8, 3/8, 4/8, 5/8, 6/8

Count back to find the difference. When you were little… 73 - 26 = ____ 47 50 48 73 47 49 52 63 53 51 47 Teacher models counting back – start at the greater number and count back- 73, (count back the blocks) 63, 53, 52, 51, 50…

Count back to find the difference. How do you think you can use strategy with fractions? 6 8 − 2 8 = ____ 𝟒 𝟖 47 and 4/8 Teacher models counting back – start at the greater number and count back- 73, (count back the blocks) 63, 53, 52, 51, 50… Teacher models counting back – start at the greater number and count back- 6/8, (count back the blocks) 5/8, 4/8 6 eighths 5 eighths 4 eighths

Adding Fractions on a number line Bobby ate 1 5 of the apple before lunch, and 3 5 of the apple during lunch. How much of the apple to Bobby eat? 1 5 2 5 3 5 4 5 1 5 2 5 3 5 4 5

Subtracting Fractions on a number line Sue cut 8 5 yards of ribbon. She used 3 5 ribbon for her hair. How much ribbon did Sue have left? 1 5 2 5 3 5 4 5 6 5 7 5 8 5 9 5

Add and subtract fractions using models Try it Out!

Find the value of the expression. 4 10 + 5 10

Find the value of the expression. 9 12 + 3 12