Activity

Grade
1

How Many Are Hidden? Hidden Beads

A number rack shows 5 red beads on the top row and 5 red beads on the bottom row. An unknown number of white beads are covered by a blue screen.

What do you notice? How many beads do you see?

Some of the beads are hiding behind the blue cover. There are 13 beads in all.
How many beads are hidden? Use math words, numbers, or pictures to explain how you know.

A number rack shows 5 red beads and 1 white bead on the top row and 5 red beads and 2 white beads on the bottom row.

What addition and subtraction equations can you write to describe the beads?

Show 13 beads with a different number of beads hiding.
You can use the Number Rack app or draw a picture. How many beads did you hide?