Numbers and place value · Ages 6–7

Seeing how many at a glance (subitising) worksheet

Part of: Numbers to 20

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Numbers and place value · Ages 6–7

Numsprite
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Write each answer in the space. For word problems, show your working and write a sentence answer.

1.Without counting one by one: how many are in the ten frame?
Answer:
2.Without counting each dot: how many dots are on the two dice altogether?
Answer:
3.How many spaces in the ten frame are still empty?
Answer:
4.The left dice shows , the right dice shows , and that is altogether.
Fill in each blank
Answer:

13.A box holds 10 eggs, set out like the ten frame in the picture. How many more eggs fill the box?
Working:
Answer:
14.Chi-keung is playing a board game and throws the two dice in the picture. The dots added up are the steps to move. How many steps forward does Chi-keung move?
Working:
Answer:
15.Tsz-hin and Ka-yee each throw a dice, and more dots wins. Tsz-hin throws the left dice and Ka-yee the right one. How many more dots does the winner have?
Working:
Answer:
16.Ming and Tsz-hin each throw a dice, and more dots wins. Ming throws the left dice and Tsz-hin the right one. How many more dots does the winner have?
Working:
Answer:
17.Ming is playing a board game and throws the two dice in the picture. The dots added up are the steps to move. How many steps forward does Ming move?
Working:
Answer:
18.Chi-keung and Tsz-hin each throw a dice, and more dots wins. Chi-keung throws the left dice and Tsz-hin the right one. How many more dots does the winner have?
Working:
Answer:

Show the answers and working

Seeing how many at a glance (subitising) worksheet: Answers and working

1. 8
First see whether the top row is full: a full row is 5. Then see how many are in the bottom row.
A row holds 5 and the frame 10: see how full the rows are and that 2 spaces are empty, and you know there are 8.
2. 4
Recognise each dice at a glance first, then count on from the bigger one.
Know the patterns: 3 on the left, 1 on the right, and 3 and 1 make 4.
3. 2
A ten frame has 10 spaces. Instead of counting the filled ones, look straight at the empty ones.
A ten frame has 10 spaces and 8 are filled, so 2 are empty.
4. 5, 4, 9
Recognise each dice at a glance, then count on from the bigger one.
Know the patterns: 5 and 4, which make 9.

5. A
Picture how a dice shows 6: how are the dots laid out? No need to count each one.
Know the dice patterns: the one showing 6 can be seen at a glance, with no counting.
6. A
Picture how a dice shows 5: how are the dots laid out? No need to count each one.
Know the dice patterns: the one showing 5 can be seen at a glance, with no counting.
7. D
Picture how a dice shows 3: how are the dots laid out? No need to count each one.
Know the dice patterns: the one showing 3 can be seen at a glance, with no counting.
8. B
Picture how a dice shows 2: how are the dots laid out? No need to count each one.
Know the dice patterns: the one showing 2 can be seen at a glance, with no counting.
9. False
Recognise how many the dice shows at a glance, then compare that with 5.
You can see at a glance the dice shows 3; compare it with 5.
10. True
Recognise how many the dice shows at a glance, then compare that with 1.
You can see at a glance the dice shows 5; compare it with 1.
11. True
Recognise how many the dice shows at a glance, then compare that with 3.
You can see at a glance the dice shows 4; compare it with 3.
12. D
Recognise each dice first and put the two together, then look for the matching ten frame.
The dice show 4 and 1, 5 altogether. A ten frame has 5 to a row: find the one holding exactly 5.

Marking: 2 for the working, 1 for the answer, 1 for the sentence.

13. 5 eggs
The box is like a ten frame, with 10 spaces. Look straight at how many are empty.
Look at the gaps: 5 eggs in, 5 spaces empty, so 5 more fill it.
14. 7 steps
Recognise each dice at a glance first, then count on from the bigger one.
Seen at a glance: 2 and 5, so 7 steps.
15. 1 dot
Recognise each dice at a glance, then count on from the smaller number to the bigger.
Left 5, right 4: the bigger is 1 more.
16. 2 dots
Recognise each dice at a glance, then count on from the smaller number to the bigger.
Left 4, right 6: the bigger is 2 more.
17. 9 steps
Recognise each dice at a glance first, then count on from the bigger one.
Seen at a glance: 3 and 6, so 9 steps.
18. 5 dots
Recognise each dice at a glance, then count on from the smaller number to the bigger.
Left 1, right 6: the bigger is 5 more.

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