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13. Rose used 1/5 meter of pink ribbon for her headband and 1/2 meter of red ribbon for her dress How many meters of ribbon did she use in all? Solve Write the answer in decimal form.

14.0.85 of a garden is planted with pechay Express the part planted with pechay as a fraction

15. Ben bought 3/4 kilogram of fish. Rename the fraction to a decimal number,​

Sagot :

13: Answer:

1/5+1/2=7/10

Solution with Steps

1/5+1/2=?

The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

LCD(1/5, 1/2) = 10

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

(1/5×2/2)+(1/2×5/5)=?

Complete the multiplication and the equation becomes

2/10+5/10=?

The two fractions now have like denominators so you can add the numerators.

Then:

2+5/10=7/10

This fraction cannot be reduced.

Therefore:

1/5+1/2=7/10

Solution by Formulas

Apply the fractions formula for addition, to

1/5+1/2

and solve

(1×2)+(1×5)5×2

=2+5/10

=7/10

Therefore:

1/5+1/2=7/10

14: Answer:

0.85=17/20

Showing the work

Rewrite the decimal number as a fraction with 1 in the denominator

0.85=0.851

Multiply to remove 2 decimal places. Here, you multiply top and bottom by 102 = 100

0.851×100100=85100

Find the Greatest Common Factor (GCF) of 85 and 100, if it exists, and reduce the fraction by dividing both numerator and denominator by GCF = 5,

85÷5100÷5=17/20

Therefore

X=17/20

In conclusion,

0.85=17/20

15: Answer:

3/4=0.75

Showing the work

We know that

3/4

is the same as

3÷4

Then using

Long Division for 3 divided by 4

gives us

=0.75