Let’s Learn!
How do I relate multiples of 10 and 5 to multiplication facts?
Goal:
Goal:
Think About It!
Goal: Relate multiples of 10 and 5 to multiplication facts.
Ava knows that you can use skip counting to multiply. Can you help Ava skip count and find the missing number?
Ava wants to learn some new strategies she can use to multiply by 10 and 5. Click through the slides to discover the strategies!
Look at the table below. It contains the 10 multiplication facts. What do you notice about the 10 multiplication facts?
Did you notice that when you multiply by 10, the product is the number with an added zero? You found a strategy to use when multiplying by 10!
Let’s look at \({10 \times 1}\). To find the product, move the 1 to the tens place and then add a zero in the ones place.
Now look at \({10 \times 4}\). To find the product, move the 4 to the tens place and then add a zero in the ones place. Click Show Me to see!
Answer each question on your own. Then, click the question to check your work.
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\({60}\) |
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\({80}\) |
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\({100}\) |
Ava is so happy! She is confident she has memorized the 10s strategy!
A 10 times table
\({10 \times 1 = 10}\) \({10 \times 2 = 20}\) \({10 \times 3 = 30}\) \({10 \times 4 = 40}\) \({10 \times 5 = 50}\) \({10 \times 6 = 60}\) \({10 \times 7 = 70}\) \({10 \times 8 = 80}\) \({10 \times 9 = 90}\) \({10 \times 10 = 100}\)A 5 times table
\({5 \times 1 = 5}\) \({5 \times 2 = 10}\) \({5 \times 3 = 15}\) \({5 \times 4 = 20}\) \({5 \times 5 = 25}\) \({5 \times 6 = 30}\) \({5 \times 7 = 35}\) \({5 \times 8 = 40}\) \({5 \times 9 = 45}\) \({5 \times 10 = 50}\)Now let's compare the multiplication facts of 5 and 10. Do you notice any patterns between the facts of 5 and 10? The products of the 5 facts are half the products of the 10 facts. Look at \({10 \times 6}\) and \({5 \times 6}\) side by side.
\({10 \times 6 = 60}\) \({5 \times 6 = 30}\)
We know half of 60 is 30, so the product of \({5 \times 6}\) is half the product of \({10 \times 6}\).
Let's try another one. If \({10 \times 9}\) is 90, what is the product of \({5 \times 9}\) ?
The product of \({5 \times 9}\) is 45, because 45 is half of 90.
Answer each question on your own. Then, click the question to check your work.
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\({35}\) |
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\({25}\) |
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\({50}\) |
Ava is jumping up and down now! Since she knows the strategy, she is confident she can multiply by 5!
Ava is practicing her multiplication facts of 5 and 10. Can you help Ava check her math? Click each fact to check your product.
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\({5 \times 0 = 0}\) |
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\({5 \times 1 = 5}\) |
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\({5 \times 2 = 10}\) |
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\({5 \times 3 = 15}\) |
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\({5 \times 4 = 20}\) |
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\({5 \times 5 = 25}\) |
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\({5 \times 6 = 30}\) |
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\({5 \times 7 = 35}\) |
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\({5 \times 8 = 40}\) |
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\({5 \times 9 = 45}\) |
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\({5 \times 10 = 50}\) |
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\({10 \times 0 = 0}\) |
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\({10 \times 1 = 10}\) |
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\({10 \times 2 = 20}\) |
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\({10 \times 3 = 30}\) |
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\({10 \times 4 = 40}\) |
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\({10 \times 5 = 50}\) |
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\({10 \times 6 = 60}\) |
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\({10 \times 7 = 70}\) |
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\({10 \times 8 = 80}\) |
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\({10 \times 9 = 90}\) |
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\({10 \times 10 = 100}\) |
Question
What is the product?
\({5 \times 10 = ?}\)
You know that \({10 \times 10}\) is 100, so \({5 \times 10}\) is half of that. The product is 50.