MathsheetsMake a worksheet →1.OA.C.6
Add and subtract within 20 using real strategies — making ten, near doubles — and know the facts to 10 fluently.
Worksheets for this standard 7 topics
Practice & models 5
Games & labs 2
The standard, officially
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).
Builds on
K.CC.A.2Count forward from any number K.OA.A.2Solve add and subtract stories to 10 K.OA.A.3Break a number into two parts K.OA.A.4Find the partner that makes 10 K.OA.A.5Add and subtract within 5 K.NBT.A.1See teen numbers as ten and ones 1.OA.B.3Add in any order or grouping 1.OA.B.4Subtract by finding the missing addend 1.OA.C.5Count on and count back