Respuesta :
The total money left with Lena is $12 + (-$6) + (- $2).
What is the subtraction rule ?
Flip the sign of the second number and change the subtraction to addition symbol. Add the numbers next. (This is how the two-stroke rule or subtraction is defined.)
Given :
Total money Lena had : $12
Cost of craft paper : $ 6
Cost of sharpener : $2
∵ Lena bought a craft paper and sharpener therefore its cost will be subtracted from the total money using the subtraction rule.
Therefore, The total money left with Lena is $12 + (-$6) + (- $2).
To learn more about subtraction refer to :
https://brainly.com/question/4721701
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