MATHEMATICS MIDDLE SCHOOL

Madame curie made some radium in her lab. she used 2/5 kg of the radium in an experiment and had 1 1/4 kg left. how much radium did she have at first?

Answers

Answer 1

Answer:

Madame Curie had $1(13)/(20)$ kg of radium at the beginning.

Further Explanation

Madame Curie used ²/₅ kg for experiment

Radium left = 1¹/₄ kg

Question:

How much radium did she have at first?

The amount of radium that Madame Curie had at first :

= Radium for experiment+ the amount of radium left

$\boxed {= (2)/(5) + 1(1)/(4) }\n$

we can do the additional if the denominator is the same, if not we need to find a common denominator, in this problem, the common denominator for 5 and 4 is 20, so the equation would be:

we change the mixed fraction into an improper fraction

$\boxed {=(2)/(5) + 1(1)/(4) } \n\boxed {=(2)/(5) + (5)/(4) =( (2 *4)/(5 *4)) + ((5 *5)/(4 *5)) } \n\boxed {= (8+25)/(20) =(33)/(20) = 1(13)/(20) }$

So, at first, Madame Curie had 1 $1(13)/(20)$ of radium

Learn more

Mixed fraction additional brainly.com/question/213168

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Mixed fraction brainly.com/question/745462

Keywords: mixed fraction, fraction, additional fraction, additional, common denominator, numerator

Answer 2

Answer: SHE HAD 3/5 TO START I BELIEVE

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Answers

Once, it goes into eight once.
If it went in there two times you'd have 10, and so on.

Hope this helps.

5+5=10 8-5=3 so 5 can go into 8 1 time, and 3 will be left over.

Hope this helps.

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Answers

3/4, 6/8, 4/5, and 6/7 are all between 2/3 and 3/3. They are all less then 1 but also greater than 2/3

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Answers

Answer:

Pint container.

Step-by-step explanation:

Since 1 gallon = 4 quarts ⇒ (1/2) gallons = 2 quarts

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Answers

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Answers

Answer:

Step-by-step explanation:

Answer:

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Step-by-step explanation:

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