What is the answer to 10 1/2 •15 1/8

Mathematics

2 answers:

LenKa [72]3 years ago

4 0

Answer:

19.6875

Step-by-step explanation:

grandymaker [24]3 years ago

3 0

Answer:

$\large\boxed{10\dfrac{1}{2}\cdot15\dfrac{1}{8}=158\dfrac{13}{16}}$

Step-by-step explanation:

Convert the mixed numbers to the improper fractions:

$10\dfrac{1}{2}=\dfrac{10\cdot2+1}{2}=\dfrac{21}{2}\\\\15\dfrac{1}{8}=\dfrac{15\cdot8+1}{8}=\dfrac{121}{8}$

Now we can multiply:

$10\dfrac{1}{2}\cdot15\dfrac{1}{8}=\dfrac{21}{2}\cdot\dfrac{121}{8}=\dfrac{(21)(121)}{(2)(8)}=\dfrac{2541}{16}=158\dfrac{13}{16}$

Other method.

You can convert to the decimal:

$10\dfrac{1}{2}=10.5\\\\15\dfrac{1}{8}=15.125$

And do the multiplication on decimals (can use a calculator):

$10.5\cdot15.125=158.8125$

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Which expressions are equivalent to the one below? Check all that apply. 53 • 5x

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</span>Calculate 3 x 5, which is 15.Since 15 is two-digit, we carry the first digit 1 to the next column.

Calculate 5 x 5, which is 25. Now add the carry digit of 1, which is 26.Since 26 is two-digit, we carry the first digit 2 to the next column.

Bring down the carry digit of 2.

<span>Therefore, 53 x 5 = 265.</span>