The big ideaTaking away is sliding a bead back. Fewer beads are across.
How it works
Taking away is sliding a bead back.
A bead slid back is gone. The beads still across are what is left.
Take one away and there is one fewer.
Four ducks, four beads across.One duck swims away: one bead slides back, and three stay.
Example 1: Four ducks
Slide four beads across, one for each duck.
One duck swims away, so slide one bead back.
Count the beads still across: three.
4 − 1 = 3
Four take away one leaves three.
Example 2: Nine take away one
Nine beads are across.
Slide one bead back.
Eight beads stay across.
9 − 1 = 8
Nine take away one leaves eight.
Example 3: Six take away one
Six beads are across.
Slide one back.
Five beads stay across.
6 − 1 = 5
Six take away one leaves five.
Example 4: Ben's balloons
Ben holds three balloons.
One balloon floats away, so slide one bead back.
Two beads stay across.
3 − 1 = 2
Three take away one leaves two.
Words to know
take away
To slide beads back so there are fewer.
slide back
Move a bead back to where it started.
fewer
Not as many.
Watch out
Slide a bead back, not across, to take away.
Count the beads still across, not the one that slid back.
Taking away makes fewer, never more.
Try it
What is 5 − 1?
What is 8 − 1?
Mia has four balloons. One floats away. How many are left?
To take away, do we slide a bead across or back?
Answers: 1. 4 · 2. 7 · 3. 3 · 4. Back
Try at homeAsk a grown-up to help you find five small things, like blocks or spoons. Count them and take one away, then count what is left and slide a bead back on the frame for the one you took.
For grown-upsFind five small things such as blocks or spoons, count them, take one away and count what is left. Slide a bead back on the frame for the one you took.
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