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Abacus · Ages 7+ · Set A
Marbles in bags, boxes and crates
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Remember: Ten tens make a hundred, and ten hundreds make a thousand. The third row of the frame counts hundreds.

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Ben's marblesBen keeps a big jar of marbles. He and Mia put ten marbles in each bag. Ten bags fit in one box, so a box holds a hundred marbles. They fill two boxes, and five bags and three loose marbles are left over. Mia wants to fit ten boxes in one big crate. A crate would hold a thousand marbles.
1
How many marbles are in one bag?
110100
2
Ten tens make one .
thousandhundredten
3
Ben has two boxes, five bags and three loose marbles. How many marbles is that?
235523253
4
Which frame shows 304?
A
B
C
5
Ten hundreds make one thousand.
TrueFalse
6
Can a frame with three rows show a thousand?
YesNo
7
This frame shows .

Match, order and fix

8
Join each one to what it is worth.
  1. 1a loose marble
  2. 2a bag
  3. 3a box
  4. 4a crate
  • A100
  • B1
  • C1000
  • D10
9
Put these in order, the smallest worth first.
  • A box of ten bags
  • A loose marble
  • A bag of ten
  • A crate of ten boxes
10
Which numbers can a frame with three rows show? Circle every one.
99910004501200
11
Ben says ten tens make a thousand. Is he right?
YesNo
12
Ben has 190 marbles and adds one more bag of ten. The ten tens trade up. How many marbles now?
200191290
13
Draw the beads for 130 on the frame.
14
Tell a grown-up how ten tens make a hundred. Write one sentence.
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Answer key · Set A
Marbles in bags, boxes and crates
110 Ben and Mia put ten marbles in every bag, and a bag is worth ten.
2hundred Ten bags of ten marbles fill one box, and a box holds a hundred.
3253 Two boxes are 200, five bags are 50 and three marbles are 3: 253. The hundreds row is read first.
4C Three hundreds, no tens and four ones. The empty tens row holds the place.
5True Ten boxes of a hundred fit in one crate, and a crate holds a thousand.
6No The most three rows can show is 999. A thousand would need a fourth row above the hundreds.
7206 Two hundreds, no tens and six ones. The empty tens row is a zero.
81-B, 2-D, 3-A, 4-C A bag is ten, a box is ten bags, which is a hundred, and a crate is ten boxes, which is a thousand.
93, 1, 2, 4 Each step up is worth ten times as much.
10999, 450 Three rows show 0 to 999. A thousand needs a fourth row.
11No Ten tens make a hundred. It is ten hundreds that make a thousand.
12200 Ten tens slide away and one bead lands on the hundreds row: 190 + 10 = 200.
14Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.