Kelly subtracted 2.3 from 20 and got 17.7. Explain why this answer is reasonable.

If 20-2.3=17.7, then if you add 17.7 to 2.3. it equals 20 which is called the communicative property because whatever you add or subtract, the answer is the same 17.7+2.3=2.3+17.7

Answered by Geekhawk | 2024-06-10

Yes, her answer is** reasonable**.
We have Kelly who is Performing** Subtraction.**
We have to give a **reasonable proof **for her answer.
What is Decimal ?
A decimal is a number that consists of a whole number and a fractional part.
According to the question -
Assume -
A = 20
B = 2.3
Now -
A - B = 20 - 2.3
Now -
A - B = 20 - (2 + 0.3)
Now,** 2.3** is a decimal. Here, 2 is a whole number and 0.3 is fractional part.
First subtract** whole number** - 2 from 20 → 20 - 2 = 18
Now subtract the fractional part - 0.3 from 18 → **18.0 - 0.3 = 17.7 **(Refer to image for this part)
Hence, her answer is reasonable.
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Answered by kumaripoojavt | 2024-06-16

Kelly's calculation of 20 - 2.3 to arrive at 17.7 is reasonable because she correctly separated the whole number and fractional parts during subtraction. First, she subtracted 2 from 20, getting 18, and then subtracted 0.3, resulting in 17.7. This method confirms that her answer is accurate and logical.
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Answered by kumaripoojavt | 2024-09-20