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Abacus · Ages 7+ · Set A
Tenths of a bar
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Remember: One whole is ten tenths. Each bead on the row is one tenth, and we write tenths after a point: 0.1, 0.2 and so on.

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The chocolate barMia and Ben find a chocolate bar made of ten equal squares. The whole bar is one whole, and each square is one tenth. A row of ten beads is like the bar: the whole row is one whole and each bead is one tenth. Mia eats two squares, so two beads slide across. That is two tenths, and we write it 0.2. Ben eats four squares. Now six tenths are gone and four tenths are left.
1
Mia ate two squares of the ten-square bar. What part of the bar is that?
two tenthstwo wholestwenty
2
A whole bar is split into equal squares.
3
Which decimal means seven tenths?
0.31.00.7
4
Which row shows 0.4?
A
B
C
5
Five tenths of a jug is half a jug.
TrueFalse
6
Three tenths are across. Slide four more beads. 0.3 + 0.4 =

Tenths, sums and fixes

7
Nine tenths are across. Slide five beads back. 0.9 − 0.5 =
8
Join each one to its decimal.
  1. 1one tenth
  2. 2three tenths
  3. 3six tenths
  4. 4ten tenths
  • A0.3
  • B0.1
  • C0.6
  • D1.0
9
Put these in order, the smallest first.
  • 0.5
  • 0.2
  • 0.9
10
Ben says 0.2 is more than 0.6. Is he right?
YesNo
11
Which are the same as one whole? Circle every one.
ten tenthsfive tenths1.00.1
12
Ten pots stand in a row and four have flowers. That is tenths of the pots.
13
Draw the beads for 0.3 on the row.
14
Write one thing at home that could be split into ten equal parts.
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