Mystery Detective Theme
This unit has worksheets for practice or assessment for the standard:
1.OA.8 Determine the unknown whole number in addition and subtraction equations relating to 3 whole numbers. For example, determine the unknown number that makes the equation true in each 8 + ? = 11, 5 = ? – 3, 6 + 6 = Δ.
There are several pages of detective work for your students to practice each type of equation above, as well as some other number combinations.
I have included 4 pages in my PREVIEW if you would like to check it out and see if it's something you could use in your class. Grab yours today!