WEBVTT
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Use the number line to complete the following addition sentence: five plus the missing number equals 17.
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Number five has been marked on the number line.
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This is where we need to start.
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And we need to reach number 17, which has also been marked on the number line.
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We have also marked on the number line the number of times we’ve counted forward one place.
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Let’s count the number of times we have to count forward to get from five to 17: one, two, three, four, five, six, seven, eight, nine, 10, 11, 12.
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We counted forward 12 places.
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So five plus 12 equals 17.
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The missing number is 12.