Q: What must be added to two fifths to make a whole one?

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four fifths must be added to make it whole

5/5 is a whole, therefore is you have 3/5 you need another 2/5 to make it 5/5.

What must be added to 3 tenths to make 1 whole

7/10 must be added to 3/10 to make 1 whole.

Five-ninths must be added to four-ninths to make a whole.

7/10 must be added to 3/10 to make a whole number, 1.

0.997

5/8

five ninths

Since 610 is a whole number, adding any other whole number will also result in a whole number.

2 halves make a whole. So if you have one half then you need another one to make it a whole. 1/2 + 1/2 = 1

610 is whole. If you mean 6 over 10, then 4 over 10 is needed.

1/4 of a pizza.

485855

There are ten fifths to two wholes. For example, a whole pie is cut into five slices. Each slice is one fifth of the whole pie. If you have two pies then you must have 5 x 2 = 10 slices (or ten fifths of two pies).

The difference must be added : 7.00-4.34 = 2.66

Sqrt of 453664 is 672 and a bit.So next square is 673 squared, ie 452929, so 265 must be added.

Add the same again 3/6 + 3/6 = 6/6 = 1/1 = 1

It is 4/10 because 6/10 plus 4/10 = 1

78

.9

64.

0.595

5600 - 400 = 5200 So 520 tens must be added.

If Heather had enough to pay 3/5 (three fifths) of the bill, that means that Jen's $8 was 2/5 (two fifths) of the bill. If two fifths is $8, then one fifth must be $4. And if one fifth of the bill is $4, then the whole bill (5/5, five fifths) must be 4 x 5 = $20.