Mathematics: Which of the following expressions has a sum of 42/100

Step-by-step explanation:dude its not that hard...

Which of the following expressions has a sum

Ответ:

hixoxo

09.01.2022

Mathematics

$\frac{3}{10}+\frac{10}{100}+\frac{2}{100}$

Step-by-step explanation:

Verify each expression

case 1) we have

$\frac{12}{10}+\frac{30}{100}$

Multiply the first term by 10/10

$\frac{120}{100}+\frac{30}{100}$

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

$\frac{120}{100}+\frac{30}{100}=\frac{150}{100}$

therefore

$\frac{150}{100} \neq \frac{42}{100}$

case 2) we have

$\frac{40}{100}+\frac{2}{10}$

Multiply the second term by 10/10

$\frac{40}{100}+\frac{20}{100}$

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

$\frac{40}{100}+\frac{20}{100}=\frac{60}{100}$

therefore

$\frac{60}{100} \neq \frac{42}{100}$

case 3) we have

$\frac{7}{100}+\frac{5}{10}+\frac{30}{100}$

Multiply the second term by 10/10

$\frac{7}{100}+\frac{50}{100}+\frac{30}{100}$

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

$\frac{7}{100}+\frac{50}{100}+\frac{30}{100}=\frac{87}{100}$

therefore

$\frac{87}{100} \neq \frac{42}{100}$

case 4) we have

$\frac{3}{10}+\frac{10}{100}+\frac{2}{100}$

Multiply the first term by 10/10

$\frac{30}{100}+\frac{10}{100}+\frac{2}{100}$

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

$\frac{30}{100}+\frac{10}{100}+\frac{2}{100}=\frac{42}{100}$

$\frac{42}{100}=\frac{42}{100}$

This expression is the answer

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Which of the following expressions has a sum of 42/100

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