Starter quiz
What number is being shown on the Gattegno chart?- 103
- 130 ✓
- 310
-
- Which of these numbers is a multiple of 10?
- 102
- 70 ✓
- 91
- 1,001
-
- What is twice the size of 34?
- '68' ✓
- What is three times the size of 12?
- '36' ✓
- What is four times the size of 8?
- '32' ✓
- Andeep has ten times as many marbles as Jun. If Jun has 5 marbles, how many does Andeep have?
- '50' ✓
Exit quiz
- Jun has a sticky-tack worm that he measures at 2 cm long. He stretches it to be three times the size. How long will it be now? ______ cm
- '6' ✓
- Match the quantities with the quantities that are ten times the size.
- 4 cm⇔40 cm ✓
- 7 kg⇔70 kg ✓
- 12 ml⇔120 ml ✓
- 5 ml⇔50 ml ✓
- Which of the following operations should be used to find ten times the size?
- + 10
- − 10
- × 10 ✓
- ÷ 10
-
- Sofia has a slinky that she measures at 5 cm long. She stretches it to be ten times the size. How long will it be now? ______ cm
- '50' ✓
What’s the multiplication being represented on this Gattegno chart?- 4 × 10 = 40
- 40 × 10 = 400 ✓
- 40 ÷ 10 = 4
- 400 ÷ 10 = 40
-
- True or false: 10 times as many and 10 times the size are the same.
- True
- False ✓
Worksheet
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Presentation
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Lesson Details
Key learning points
- Finding ten times as many is the same as multiplying by 10
- 10 is ten times the size of 1
- A digit in the tens column is 10 times the value of a digit in the ones column.
Common misconception
10 times the size and 10 times as many are achieved through the same operation but they are different.
Use sticky-tack or plasticine. Create 10 blobs that are equal in length to 1 blob that has been stretched. Encourage the children to see that the value of their length is the same but one is made of countable objects whereas the other is stretched.
Keywords
Scaling - Scaling is when a given quantity is made ___ times the size.
Multiple - A multiple is the product of a number and an integer.
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