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3 years ago

Please help me with this Thanks

Mathematics

2 answers:

Salsk061 [2.6K]3 years ago

8 0

Answer:

8/40 + 20/40 = 28/40

Step-by-step explanation:

It's about finding the common denominator for the fractions.

we can easily see that 40 is a common denominator for denominators 10 and 4. 20 would work too, but 40 is "instantly seen".

2/10 = (2*4) / (10*4) = 8/40

2/4 = (2*10) / (4*10) = 20/40

8/40 + 20/40 = (8+20) / 40 = 28/40

alexira [117]3 years ago

7 0

So you make them the same common denominator
As you see, 2/10 = 8/40
2/4 = x/40, multiply by 10
2/4 = 20/40
Then add because same denominator
Now you would get:
8/40 + 20/40 = 28/40

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3 years ago

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3 years ago

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iVinArrow [24]

❄ Hi there,

let us revise the rounding rules and then, get down to rounding the number.

$\sf{Rounding \ Rules:}$

If the number you need to round is followed by a number from 0 to 4, you round down.
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Now we can start the rounding process.

Reading the problem & the directions, we notice that we need to round to 3 decimal places (3 numbers after the decimal point).

Looking at the fourth number, we notice that it's less than 5.

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↬ $\sf{18.57631 \ rounded \ to \ 3 \ DP \ = \bf{18.576}}$

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2 years ago

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3 years ago

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4 years ago

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