Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Standard TypeMichigan State Math Standards
Join Mrs. Markavich with a Mystery Math Mistake - see if you can help D.C. with an addition mistake! We'll solve word problems with unknowns in different positions.
Join Mrs. Markavich with a Mystery Math Mistake - see if you can help D.C. and Value Pak with an addition mistake! We'll also solve word problems and write equations to match.
Join Mrs. Markavich for a number talk with Abracus as we work on compensation. We'll sort, describe and create solid shapes.
Join Mrs. Markavich for a number talk with Abracus as we work on compensation. We'll sort flat shapes and create a data display to represent our sort.
Join Mrs. Markavich for a number talk with D.C. as we work on decomposing and composing to make a 10. We'll also explore what makes a shape a triangle, a rectangle, or a square.