This is missing addend practice with two adends on each side of just one equal sign (example:__ + 2 = 4 + 3; 5 + __ = 4 + 3; 6 + 0 = __ + 2; 9 + 0 = 5 + __; 4 + __ = 7 - 1). There is practice with a missing addend in each spot and with both addition and subtraction. (Note: The thumbnail image on here shows the missing addend boxes are off, but they are really not off when you download this product. If you have any trouble after your purchase, I could email it to you if necessary (just click on "Ask a Question" and leave me your email address.)) Thank you and happy teaching!