Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
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 with a Mystery Math Mistake - see if you can help D.C. with his strategy! Next, can you help us measure with different units (small and large paper clips, connecting cubes and small cubes)?
Join Mrs. Markavich for a subtraction word problem with Professor Barble. Next, get ready to make sense of equations that have a missing part and look out for D.C. as we make a ten to solve addition easier!
Join Mrs. Markavich for a missing addend word problem with Professor Barble. Next, we are going to look closely at addition problems to see when we make a new ten or when we don't. You will be an expert and looking carefully at addition problems!