I-CANyons Parent Toolkit for Kindergarten Mathematics
Numbers and Operations and Base Ten: I CAN...
Make or break apart numbers from 11-19 into tens and ones
K.NBT 1 Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18=10+8); understand that these numbers are composed of ten ones, and one, two, three, four, five, six, seven, eight, or nine ones.
In Other Words
The child makes or breaks apart numbers from 11-19 into tens and ones. For example: 18 can be broken into 1 group of 10 and 8 ones.
Once child can effectively work with composing and decomposing numbers from 11-19 into ten ones and some further ones - using objects, then have child work on writing it in an equation.
For example, give child 18 black beans. Using a Ten-Frame have the child put one bean in each spot. They will see they have a group of 10 and 8 more. Then they can write the addition sentence to match the beans, 10 + 8 = 18.
If Not Yet Mastered
Math Activities -
*Dots and Numeral Cards (11-20)
*Cubes on the Ten Frame
*Teens on the Ten Frame
*Teens on Ten Frame, books 1 and 2
*Tens and Ones with Unifix Cubes