Adding and subtracting mixed numbers with unlike denominators
2 answers:
Answer:
Step-by-step explanation: You need to find a the lowest number that the denominators can be timed by. In you're case. You can just times 5 by 2 = 10
So that both the denominators are 10. And the denominator that was once 5. The numerator of that fraction also needs to be timed by 2.
So then you have 7 18/10 - 6 15/10
Then you can convert them to to proper fractions 8 8/10 - 7 5/10
Then you can take away the fractions so it's
8 8/10 - 7 5/10 = 1 3/10
Convert both numbers into improper fractions by multiplying the whole number by the denominator and adding the numerator
44/5 - 75/10
then you make them have the same denominator (in this case it would be 10) - (44x2)/(5x2)
88/10 - 75/10
then you take away each number as you would normally (88-75)
13/10
and finally, convert
1 3/10
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Answer:
Ste-by-step explanation:bf=7x-10 bc=4x-29
Sod=1*1
to cover =30*14
to cover=420
to cover divided by one piece
=420/1
=420 pieces
Answer:
2940
Step-by-step explanation:
You are subtracting a negative number. "Minus a negative is plus."
525 - (-2415) = 525 + 2415 = 2940
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Answer:
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Step-by-step explanation:
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