Question

Jill's pencil is 10, 2/ 5

And jenny's pencil is 13.5 cm long but I still don't understand like how much longer is jenny's pencil that Jill's

Answer 1

9514 1404 393

Answer:

3.1 cm

Explanation:

The difference in lengths is ...

13 5/10 - 10 4/10 = 3 1/10 . . . centimeters

Jenny's pencil is 3.1 cm longer than Jill's.

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Comment on the subtraction

Above, we have converted both numbers to mixed numbers with a common denominator. You can just as easily convert both numbers to decimal values.

10 2/5 = 10 4/10 = 10.4

Then 13.5 -10.4 = 3.1, as above.

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The wording "how much longer is A than B?" means, "what is the difference A - B?" That difference is found by subtraction. Many graphing calculators will let you enter mixed numbers as part of an expression, so your calculator may be able to find this value for you.

Answer 2

Jenny's pencil is 3.1 cm longer than Jill's pencil

Explanation:

Given that Jill's pencil is 10 2/5 cm while jenny's pencil is 13.5 cm then to know how much longer jenny's pencil is than Jill's you apply subtraction.

Jenny's pencil length - Jill's pencil length

13.5 cm - 10.4 cm = 3.1 cm