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Abacus · Ages 5+ · Set A
Take one away
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Goal: 15 min
Score/ 11
Remember: Taking away is sliding a bead back. One is gone.

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A grown-up reads the story aloud first.

Ducks at the pondFour ducks swim in the pond. Four beads are across on the frame. One duck swims away. Pip slides one bead back. Now three ducks are left, and three beads are across.
1
How many ducks were in the pond first?
🦆🦆🦆Three🦆🦆🦆🦆Four🦆🦆🦆🦆🦆Five
2
A bead slides back when a duck swims away.
TrueFalse
3
How many ducks are left?
🦆🦆🦆Three🦆🦆Two🦆🦆🦆🦆Four

Slide one back

4
Eight beads are across. Slide one back. How many now?
🔵🔵🔵🔵🔵🔵🔵🔵🔵Nine🔵🔵🔵🔵🔵🔵🔵Seven🔵🔵🔵🔵🔵🔵🔵🔵Eight
5
Which frame shows five take away one?
🐶
A🐱
B🐸
C
6
7 − 1 =
7
Six take away one leaves seven.
TrueFalse
8
Join each sum to what it leaves.
  1. 13 − 1
  2. 25 − 1
  3. 39 − 1
  • A8
  • B4
  • C2

Think and do

9
Mia has four balloons. One floats away. How many are left?
🎈🎈🎈🎈🎈Five🎈🎈🎈Three🎈🎈🎈🎈Four
10
More beads are across after one slides back.
TrueFalse
11
Number the steps.
  • Slide one bead back
  • Four ducks, four beads across
  • One duck swims away
  • Three beads are across
12
Draw five beads across. Cross one out.
13
Copy it. 5 − 1 = 4
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Answer key · Set A
Take one away
1Four Four ducks swam in the pond, and four beads were across.
2True Taking away is sliding a bead back.
3Three Four ducks, and one swims away, leaves three ducks.
4Seven One bead slides back, so seven beads stay across.
5C Five beads, and one slides back, leaves four beads across.
66 Seven beads, and one slides back, leaves six beads across.
7False Taking one away leaves one fewer. Six take away one leaves five.
81-C, 2-B, 3-A Take one away and the number goes down by one.
9Three Four balloons, and one floats away, leaves three balloons.
10False When a bead slides back, fewer beads are across.
113, 1, 2, 4 The bead slides back when the duck swims away.
Mark each answer, count the right ones and write the score on the sheet.