The equations [(-5) + (-3)] + 6 = -2 and [6 + (-5)] + (-3) = -2 he can use to find the sum of the temperatures for those months ⇒ 3rd , 5th
Step-by-step explanation:
The given is:
- Ken predicts that the average temperature will be -5°C in December
- He predicts the temperature will rise 6°C in January and fall 3°C in February
We need to find which equations can he use to find the sum of the temperatures for those months
∵ The temperature in December will be -5°C
∵ The temperature will rise 6°C in January ⇒ + 6
- Rise means positive number
∵ The temperature will fall 3°C in February
- Fall means negative number ⇒ - 3
∴ The sum of the temperatures for those months = (-5) + 6 + (-3)
We can add 6 and (-5), and then add the result to (-3)
∵ (-5) + 6 + (-3) = [6 + (-5)] + (-3) = [1] + (-3) = -2
∴ The sum of the temperatures for those months = [6 + (-5)] + (-3) = -2
OR
We can add (-5) and (-3), and then add the result to 6
∵ (-5) + 6 + (-3) = [(-5) + (-3)] + 6 = [-8] + 6 = -2
∴ The sum of the temperatures for those months = [(-5) + (-3)] + 6 = -2
The equations [(-5) + (-3)] + 6 = -2 and [6 + (-5)] + (-3) = -2 he can use to find the sum of the temperatures for those months
Learn more:
You can learn more about the numbers in brainly.com/question/537998
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