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tensa zangetsu [6.8K]
3 years ago
12

Decimals- do i move the decimal when adding or multiplying

Mathematics
1 answer:
EastWind [94]3 years ago
6 0

Answer:

when adding you just line the decimals up like this, let's say you had to add 1 to 2.58.

2.58

+ <u> 1 .00</u>

3.58

when multiplying you might have to move it, say you had to multiply 1.5 by 2.2. (you don't have to line up the decimals like with addition)

1 .5

<u> </u><u>×</u><u> 2.2</u>

30

<u> </u><u>+</u><u> 300</u>

3.30

1.5 has one decimal place and 2.2 also has one decimal place so you put those 2 decimal places in your answer.

sorry if this is a bit confusing lol

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That would mean that  x would be replaced by x - 3.  Just to be sure let's try it.

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