I used this math bingo activity as a way to review before a test for multiplying postive and negative fractions and simplifying. The students get to practice up to 24 problems and they don't even notice. The kids love it. But be prepared to give out prizes. I always give mechanical pencils from the dollar store.
First print out each of the 8 sheets in excel one by one. Then cut each page in the middle to form two bingo cards. Then put each bingo card inside a plastic cover. Each pair of students will have 1 bingo card. This is a set for 32 students. All bingo cards are mixed. They will use two small white boards or clear boards or their notebook to write and show their work. If you have the whiteboards they will use one dry erase marker per pair. Pass them out at the beginning of class.
You will use the sheet in the "Upload Preview" that shows you all the math problems and the answers. Put it inside a clear plastic cover. You will randomly choose questions, read outloud, and write the math problem on the board. Give the students 30 seconds to 1 min to solve on their whiteboards or notebooks. Tell them that they will take turns answering the question. After the 30 seconds are up, select a random student to tell you how to solve and you solve on the board. Do the same thing for the next question until they get 5 in a row they yell BINGO! Tell them you are looking for 5 winning teams. You will write their name on the board as they win. 1st, 2nd, 3rd, 4th, 5th place.
You will give mechanical pencils or whatever gift you prefer to each of the teams. One per student. Students will use the dry erase marker to circle or x each of the answers on the bingo card. On the end, have them erase the marks on the plastic cover of the bingo card and pass the cards forward.
It took hours to make these cards, because I had to sort the answers in excel manually so now you have them made and reuse every year.
You can repeat the process for each class. Good luck!