Common Core Aligned Resources for 1.OA.C.6
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).
Showing 1 - 30 of 119 resources
Multiplication Facts, Facts, Facts and Some Reese's Pieces for Snack!
1st - 3rd CCSS: Designed
Math minors observe and demonstrate various times table facts using Reese's Pieces candy. They listen to the book, "Reese's Pieces Count by Fives Book," demonstrate and chant various times tables, and practice multiplication facts using...
St. Patrick's Day Subtraction Worksheet 1
K - 2nd CCSS: Designed
You are in luck! On this St. Patrick's Day-themed activity, little leprechauns compute the answers to 20 one-digit subtraction problems and write the answers in the shamrocks. They may also wish to color the shamrocks. An answer key is...
Look for Easy Numbers for E-Z Addition
2nd - 4th CCSS: Adaptable
All kids learn differently. For some, mental math is the best and most efficient way to add a series of numbers. After viewing a few sample problems, learners find ways to add numbers to 10 before adding them all together, and then write...
Lucky Leprechaun Subtraction Worksheet 1
1st - 2nd CCSS: Designed
First graders calculate the answers to 29 subtraction problems using digits 1 through 10. The only thing that relates this to St. Patrick's Day is a leprechaun in the lower right corner. If you wanted to use the worksheet at a different...
Add and Subtract Within 20 - Independent Practice Worksheet
1st CCSS: Adaptable
Young mathematicians draw pictures to help them solve a series of addition and subtraction word problems. The final problem in the set of ten is a bit fishy because Nikki caught some fish, threw those back, and then caught some more.
2-Dimensional Shapes: Adding Up Shapes
1st - 2nd CCSS: Designed
These pictures will cost you! Each shape is worth a money amount. Scholars use this value system to price four images composed of these shapes. There is an example to help them get started which demonstrates labeling each shape before...