ATI TEAS 7 Math Diagnostic (38 Questions)

Question 5 of 38

Max has 2.5 times the number of marbles that Jacob has. Jacob has 34 marbles. Steven has 0.2 times the number of marbles that Max has. How many marbles does Steven have?

• 51
• 7
• 17
• 10

End Quiz

Answer Explanation

Correct

Answer:

17 marbles.

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Step 1: Interpret the problem
First, we must understand what is happening in this situation.
To find the number of marbles that Steven has, we need to multiply the number of marbles Max has by 0.2.

Step 2: Calculate the number of marbles that Max has
Since Max has 2.5 times the number of marbles Jacob has, we can multiply the number of marbles Jacob has by 2.5. Remember, with decimals, we pretend as if the decimals are not there. We do not line up numbers by their decimal point.

number of marbles of Jacob × number of marbels of Max = total number of marbels Max has

34×2.5–––––––

Multiply Like Normal and fill in any empty spots with a placeholder zero.

×2.5

Put the Decimal Place in the Right Location

Since there is 1 number to the right of the decimal point in the problem, there will be 1 number that is behind the decimal in the product. Therefore, the decimal point goes between 5 and 0.