SSAT Elementary Level Math : How to subtract

Study concepts, example questions & explanations for SSAT Elementary Level Math

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Example Questions

Example Question #31 : How To Subtract

Bob is \(\displaystyle 5\) inches shorter than his older brother Terry. If Terry is \(\displaystyle 61\) inches tall, how tall is Bob?

Possible Answers:

\(\displaystyle 66\ inches\)

\(\displaystyle 51\ inches\)

\(\displaystyle 56\ inches\)

\(\displaystyle 71\ inches\)

Correct answer:

\(\displaystyle 56\ inches\)

Explanation:

To find Bob's height, you must subtract (shorter than) Terry's height by the difference of heights between the brothers:

\(\displaystyle 61-5=56\ inches\)

Example Question #141 : Fluently Add, Subtract, Multiply, And Divide Multi Digit Decimals: Ccss.Math.Content.6.Ns.B.3

Elliot bought \(\displaystyle 3\) coffee drinks from a famous coffee shop. The first two drinks cost him \(\displaystyle \$8.91\) and he paid a total of \(\displaystyle \$12.35\). How much did the third drink cost?

Possible Answers:

\(\displaystyle \$3.23\)

\(\displaystyle \$4.36\)

\(\displaystyle \$3.44\)

\(\displaystyle \$2.78\)

Correct answer:

\(\displaystyle \$3.44\)

Explanation:

To find the cost of the third drink, you must subtract the total cost by the cost of the two drinks.

\(\displaystyle $12.35 - $8.91 = \$3.44\)

Example Question #33 : Operations

\(\displaystyle 5.89 - 3.98 =\)

Possible Answers:

\(\displaystyle 1.91\)

\(\displaystyle 1.89\)

\(\displaystyle 2.10\)

\(\displaystyle 2.01\)

Correct answer:

\(\displaystyle 1.91\)

Explanation:

\(\displaystyle 5.89 - 3.98 =\)

We first subtract the hundredths place: \(\displaystyle 9-8 = 1\)

Then the tenths place: Since \(\displaystyle 8\) is less than \(\displaystyle 9\), we have to borrow from the \(\displaystyle 5\), the \(\displaystyle 5\) becomes a \(\displaystyle 4\) and the \(\displaystyle 8\) becomes \(\displaystyle 18\): \(\displaystyle 18 - 9 = 9\)

Then the ones place: \(\displaystyle 4-3 = 1\)

So the final answer is \(\displaystyle 1.91\).

Example Question #34 : Operations

\(\displaystyle 11.85 - 8.94 =\)

Possible Answers:

\(\displaystyle 2.85\)

\(\displaystyle 3.01\)

\(\displaystyle 2.87\)

\(\displaystyle 2.91\)

Correct answer:

\(\displaystyle 2.91\)

Explanation:

\(\displaystyle 11.85 - 8.94 =\)

We first subtract the hundredths place: \(\displaystyle 5 - 4 = 1\)

Then the tenths place: Since \(\displaystyle 8\) is less than \(\displaystyle 9\), we have to borrow from the \(\displaystyle 1\), the \(\displaystyle 1\) becomes a \(\displaystyle 0\) and the \(\displaystyle 8\) becomes \(\displaystyle 18\): \(\displaystyle 18 - 9 = 9\)

Then the ones place: \(\displaystyle 0-8\), since the \(\displaystyle 0\) is less than \(\displaystyle 8\), we have to borrow from the \(\displaystyle 1\), the \(\displaystyle 1\) becomes \(\displaystyle 0\) is the tens place, and the \(\displaystyle 0\) becomes \(\displaystyle 10\) in the ones place:

\(\displaystyle 10-8 = 2\)

So the final answer is \(\displaystyle 2.91\).

Example Question #32 : How To Subtract

Devyn is given a $100 bill from his father. He spends some of that money on a $29 video game and a $22 sweater. How much money does Devyn have left now?

Possible Answers:

\(\displaystyle \$ 29\)

\(\displaystyle \$ $49\)

\(\displaystyle \$ 51\)

\(\displaystyle \$ 68\)

\(\displaystyle \$ 31\)

Correct answer:

\(\displaystyle \$ $49\)

Explanation:

Since Devyn is spending money, we need to subtract his purchases from the original amount of money that he is given by his father!

\(\displaystyle \$ 100 - \$ 29 - \$ 22 = \$ 49\)

Example Question #33 : How To Subtract

Madonna decided to donate some of her toys to charity. She had 22 toys, and donated 8 of them to charity. After donating, how many toys does Madonna have left?

Possible Answers:

\(\displaystyle 6\)

\(\displaystyle 11\)

\(\displaystyle 14\)

\(\displaystyle 18\)

\(\displaystyle 9\)

Correct answer:

\(\displaystyle 14\)

Explanation:

Since Madonna is giving away some of her toys, we need to subtract!

\(\displaystyle 22 - 8 = 14\)

Example Question #37 : Operations

Yvette donates \(\displaystyle \$50\) from her weekly paycheck to charity. She earns \(\displaystyle \$225\) per week. How much money is Yvette left with each week after her charitable donation?

Possible Answers:

\(\displaystyle \$150\)

\(\displaystyle \$250\)

\(\displaystyle \$275\)

\(\displaystyle \$155\)

\(\displaystyle \$175\)

Correct answer:

\(\displaystyle \$175\)

Explanation:

Since Yvette is giving away part of her earnings to charity, she is losing money every week. Thus, we should subtract!

\(\displaystyle \$225 - \$50 = \$175\)

 

Example Question #35 : How To Subtract

\(\displaystyle 89 - 66 =\)

Possible Answers:

\(\displaystyle 22\)

\(\displaystyle 24\)

\(\displaystyle 23\)

\(\displaystyle 21\)

\(\displaystyle 20\)

Correct answer:

\(\displaystyle 23\)

Explanation:

Find the difference between the digits in each place value:

Ones place: \(\displaystyle 9 - 6 = 3\)

This is the new digit in the ones place

Tens place: \(\displaystyle 8 - 6 = 2\)

This is the new digit in the tens place

\(\displaystyle 89 - 66 = 23\)

Example Question #34 : How To Subtract

Emmanuel has \(\displaystyle 18\) trading cards. He gives \(\displaystyle 2\) to his younger brother, \(\displaystyle 5\) to his best friend, and \(\displaystyle 3\) to his cousin. How many trading cards does Emmanuel have left?

Possible Answers:

\(\displaystyle 0\)

\(\displaystyle 5\)

\(\displaystyle 28\)

\(\displaystyle 8\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 8\)

Explanation:

Since Emmanuel is giving away some of his cards, we need to subtract!

\(\displaystyle 18 - 5 - 3 - 2 = 8\)

Example Question #34 : How To Subtract

Place the following numbers in ascending order:

\(\displaystyle 4,12,11,2\)

Possible Answers:

\(\displaystyle 4,2,11,12\)

\(\displaystyle 4,2,11,12\)

\(\displaystyle 2,4,12,11\)

\(\displaystyle 12, 11, 4, 2\)

\(\displaystyle 2,4,11,12\)

Correct answer:

\(\displaystyle 2,4,11,12\)

Explanation:

2 is less than 4, 4 is less than 11, and 11 is less than 12.

Note that ascending means increasing, not decreasing!

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