WEBVTT
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What is the missing number?
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Our sequence of numbers is this: zero and one tenth, zero and three tenths, a missing value, zero and seven tenths, zero and nine tenths.
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To solve for the missing number, we’ll need to find out what operation is happening at each step.
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Going from one tenth to three tenths is an increase.
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It’s going up.
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This tells us that we’ll likely need to add.
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One tenth plus some number equals three tenths.
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I know that one plus two equals three.
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And that means one tenth plus two tenths equals three tenths.
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We think that the pattern here is adding two tenths.
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But let’s check with the other values that we have.
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To move from seven tenths to nine tenths, do you add two tenths?
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It would look like this: seven tenths plus two tenths does equal nine tenths.
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Now we’ve determined our pattern.
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Our pattern here is adding two tenths every time from one tenth to three tenths.
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So to solve for our missing number, we’ll need to add two tenths to the three tenths, zero and three tenths plus zero and two tenths.
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Three plus two is five.
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Bring down the decimal.
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Zero plus zero equals zero.
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The missing value is zero and five tenths.