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which is the best estimate for the sum 3/8 and 1/12

Sagot :

When you want to add fractions with different denominators-which are the bottom numbers- you have to find the lowest numbers that you can multiply to go into both numbers.  I know that you can multiply 8×3 to get 24.  And that I can multiply 12×2 to get 24.  So 24 would be what we change the denominators to.  

But we can't just change the denominators.  I have to change the numerators, too.  Since I multiplied 8×3, I have to multiply the numerator by 3, also.  3×3=9.  The new fraction is [tex] \frac{9}{24} [/tex].  

Do the same thing to the other fraction. But we will multiply by 2. 1×2=2.  So now we have [tex] \frac{2}{24} [/tex].  We can now add.

[tex] \frac{9}{24} [/tex]+[tex] \frac{2}{24} [/tex]  Only add the top numbers.  We have [tex] \frac{11}{24} [/tex]That fraction cannot be reduced, so [tex] \frac{11}{24} [/tex] is the final answer.
11/24 is the  correct answer to your question