1.OA.8 First Grade Common Core Math Task Cards - Determine The Unknown Number Practice provides two ways for students to practice finding the unknown whole number in an addition or subtraction equation. 1.OA.D.8 1 OA.8
Includes 40 unique Task Cards with 20 being multiple choice and 20 fill-in the blank!
Includes both a student answer sheet as well as matching layout (easier to grade) answer key! Cards are numbered so that answers on student sheet will be in proper order. Cards are 4 to a page and can be printed in both color or gray-scale (I tried both!) Don't forget to laminate so they will last for years!
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Standard 1.OA.8 Work with addition and subtraction equations.
8. Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? – 3, 6 + 6 = ?.