3 - 1 2 = 2 1 4 - 1 2 3 - 1 1 3

4 2 2 4 5 5 2 2 3 3 1 3 3 1 2 2

Mixed numbers like 1 1 2 can be decomposed into their individual parts. = 1 2 + 1 2 1 2 1 2 1 2 1 2 1 1 2 = 1 2 + 1 2 + 1 2 = 3 2

4 - 1 1 2 ≠ 3 1 2 4 - 1 1 2 = 2 1 2 ≠

Now I have 2 + 2 2 . I can easily subtract 1 2 . I’ll cut just one cookie making two halves. I need to subtract 1 2 . 3 = 2 2 2 Mom says I can eat the cookies if I give my sister 1 2 of a cookie. - 1 2 2 1 2 cookies Now I have 2 + 2 2 . I can easily subtract 1 2 .

= 2 2 2 - 1 2 =- 1 2 1 2 1 2 2 1 2

I will decompose one of the wholes into 4 4 . 2 1 4 = 1 5 4 = 1 + 4 4 + 1 4 = 2 1 4 1 4 1 4 1 4 1 4 I need to subtract 2 4 from 2 1 4 . I need to decompose into more 1 4 pieces. I will decompose one of the wholes into 4 4 . - 1 2 = - 2 4 = 1 4 1 3 4 1 4

I need to decompose one of the wholes into 3 3 . 3 - 1 1 3 I need to subtract 1 1 3 = 2 3 3 - 1 1 3 = - 1 1 3 I need to decompose one of the wholes into 3 3 . 1 3 1 3 1 3 1 2 3