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Nezavi [6.7K]
3 years ago
10

I need help with this! ​

Mathematics
1 answer:
Yanka [14]3 years ago
7 0

Part A

Answer:  33.2 degrees F

Explanation: Adding on a negative is the same as subtracting. So 72.3 + (-39.1) = 72.3 - 39.1 = 33.2

================================================

Part B

Answer: 70 + <u>  2   </u> + <u>  0.3  </u>  + (-30) + (-9) + (  <u> </u><u>-0.1  </u> )

Explanation:

Think of 72 as 70+2. Furthermore, think of 72.3 as 70+2+0.3; we just break the number up into its corresponding digits (adding zeros when needed). The 7 is in the tens place, the 2 is in the units or ones place, and the 3 is in the tenths place.

Similarly, we have 39.1 break down into 30+9+0.1, in which all three terms are made negative to represent -39.1

================================================

Part C

Answer:   70 + (-30) + <u> 2 </u> + (-9) + <u>0.3</u> + ( <u>-0.1</u>  )  

Explanation: Arrange the tens place value items to be next to each other. Same goes for the units place value, and also the tenths place value.

================================================

Part D

Answer:  [70 + (-30)] +  [ <u> 2 </u> + (-9) ] + [ <u>0.3</u> + ( <u>-0.1</u>  ) ]

Explanation: Take the result of part C and surround each pair of terms in square brackets to show how the terms pair up.

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