I use this with 3rd grade at the end of the year to get ready for 4th grade.
Find matches by reducing. When both partners are done, they will switch papers. Each person will check their partner’s answers by showing that cross-products are equal.
1st partner: 1-5 match with capital letters
2nd partner: 6-10 match with lower case letters
--Each person will put the letter around the cross shape as shown on the answer key at the end. It works best if the students reduce the fractions in the cross, then reduce the fractions on the matching cards and plug letters in as they work. At the end, the students can cut out cards and tape around the cross for display.