This activity is beneficial for students as they are able to manipulate objects and visually see how to solve a doubles plus 1 or doubles plus 2 basic addition problem. You will need small manipulatives (I use centimeter cubes) to place in each circle.
This is to be used with the Doubles Plus 1-2 Practice Activity Worksheet.
Example: 8 + 9 = ____________
*Students will place 8 cubes in the first big circle and the same amount of cubes (because the circles are the same BIG size) in the second big circle. The remaining cubes are placed in the bottom SMALL circle. They should then be able to clearly see that the new addition problem is 8 + 8 + 1 = 17.
Prior Knowledge: Students will need to be able to identify the sums for all 1 digit "doubles" addition problems.