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Question
Choose the correct representation of the expression 3+9−4 on the number line.
Choose the correct representation of the expression 3+9−4 on the number line.
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Solution
The correct option is B
To add 3: Starting from 0, we make 3 hops to the right and arrive at 3.
To add 9: Starting from 3, we make 9 hops to the right and arrive at 12.
To subtract 4: Starting from 12, we make 4 hops to the left to subtract 4and arrive at 8.
∴3+9−4=8
To add 3: Starting from 0, we make 3 hops to the right and arrive at 3.
To add 9: Starting from 3, we make 9 hops to the right and arrive at 12.
To subtract 4: Starting from 12, we make 4 hops to the left to subtract 4and arrive at 8.
∴3+9−4=8
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