Compose and decompose numbers within 10 using number bonds (K.OA.A.3)
Exercise
Difficulty 2
~0 min
math.gK.s.ex_15
Rekenrek Show
Prompt
Show 9 on the rekenrek. How many more beads do you need to make 10?
M-K-S-EX-15-A
Manipulative
Physical / non-image
Photo of a 10-bead rekenrek with 9 beads pushed to the left (5 red + 4 white) and 1 bead remaining on the right.
How it's presented
mode
manipulative
Answer criteria
type
numeric
value
1
Hints
- Slide 9 beads to one side.
- Count the beads still on the other side.
Misconceptions to watch
- Says 9 (copies)
- Says 0 (thinks 9 is already 10)
Used in lessons