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ISEE Lower Level Math : Operations

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Example Questions

Example Question #61 : How To Multiply

Mindy bought a box of granola bars for $\$2.50$ . She sold each bar for $\$1.00$ . If Mindy sold all bars, how much of a profit would she make in dollars?

Possible Answers:

$\$2.50$

$\$5.00$

$\$0.50$

$\$0.25$

Correct answer:

$\$2.50$

Explanation:

If the box of granola bars was $\$2.50$ , this means that each granola bar cost $\$0.50$ because $\$2.50$ divided by is $\$0.50$ .

If Mindy then sold each granola bar for $\$1.00$ , the profit per bar would be $\$1.00$ minus the $\$0.50$ cost of the bar, which is equal to $\$0.50$ .

If she sold all granola bars, then she would have made a profit of $\$0.50\cdot5$ , which is $\$2.50$ .

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Example Question #62 : How To Multiply

Maria makes jewelry with beads. She can make a pair of earrings with beads, a bracelet with beads, and a necklace with beads. If Maria has 120 beads, which of the following could she make?

Possible Answers:

bracelets

necklaces

bracelets and pairs of earrings

pairs of earrings

Correct answer:

pairs of earrings

Explanation:

Given that each pair of earrings requires beads, the number of beads that pairs of earrings would require is equal to:

$4\cdot30=120$

Since Maria has 120 beads, she has a sufficient number of beads to make earrings. The other jewelry arrangements will result in there being a shortage of beads: Maria would need 400 beads to make necklaces ( $20\cdot20=400$ ), 130 beads to make bracelets ( $13\cdot10=130$ ), and 122 beads to make bracelets and pairs of earrings ( (11*10)+(3*4)=110+12=122 ).

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Example Question #63 : How To Multiply

The cost for two people to be part of a tennis club is $\$20$ a month. If Jon and Marie share the annual cost of the club membership, how much does each person have to pay per year?

Possible Answers:

$\$60$

$\$240$

$\$180$

$\$120$

Correct answer:

$\$120$

Explanation:

If the cost of being part of a tennis club for two people is $\$20$ a month, that means the annual cost for two people will be $12\cdot\$20=\$240$ .

If two people share this cost, that means that each person will have to pay $\$120$ because half of $\$240$ is $\$120$ .

Therefore, the correct answer is $\$120$ .

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Example Question #61 : Operations

On average, Lisa sends twelve emails a day. How many emails would she send in a week if she sent her average number of emails every day of the week?

Possible Answers:

Correct answer:

Explanation:

If Lisa sends an average of emails a day and sends emails over a course of days, that means that the total number of emails that she sends will be equal to $12\cdot7=84$ . Therefore, the correct answer is .

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Example Question #65 : How To Multiply

Andrew recorded a song with his band that is minutes and seconds long. $\frac{3}{5}$ of the way into the song, he begins a drum solo. For how long does the song play before the solo begins?

Possible Answers:

minute and seconds

minute

minute and seconds

minutes and seconds

Correct answer:

minute and seconds

Explanation:

If a song is minutes and seconds long, this is the equivalent of being 135 seconds long. ( minutes is equal to 120 seconds and 120+15=135 .)

$\frac{1}{5}$ of 135 is because $\frac{1}{5}\cdot \frac{135}{1}=\frac{135}{5}=27$ . Therefore, $\frac{3}{5}$ of 135 is equal to 3*27=81 . Therefore, seconds (or minute and seconds) will go by before the drum solo begins.

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Example Question #61 : How To Multiply

Anita owns a store. She buys twenty sweaters for $\$15.00$ each and sells them for $\$25.00$ each. If she sells all of the twenty sweaters that she bought, how much profit will she earn in dollars?

Possible Answers:

$\$220.00$

$\$200.00$

$\$100.00$

$\$2,000.00$

Correct answer:

$\$200.00$

Explanation:

If Anita buys twenty sweaters for $\$15.00$ each and sells them for $\$25.00$ each, this means that she makes $\$10.00$ profit per sweater. If she sells sweaters, the profit that she makes will be $20\cdot\$10.00$ , which is equal to $\$200.00$ .

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Example Question #62 : Operations

Find the product of and .

Possible Answers:

2.4

0.417

Correct answer:

Explanation:

Find the product of two numbers by multiplying them together. $12 \times 5 = 60$ , so the correct answer is .

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Example Question #63 : Operations

Find the product of:

$-9\times27$

Possible Answers:

243

234

Correct answer:

Explanation:

When multiplying one negative factor with one positive factor the product will always be negative.

Thus, the solution is:

$-9\times27=-243$

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Example Question #64 : Operations

Find the product of:

$-36\times-6$

Possible Answers:

246

108

216

Correct answer:

216

Explanation:

When multiplying two negative factors the product will always be positive.

Thus, the solution is:

$-6\times-36=216$

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Example Question #65 : Operations

Find the product of:

$-25\times15$

Possible Answers:

325

375

Correct answer:

Explanation:

When multiplying one negative factor with one positive factor the product will always be negative.

Thus, the solution is:

$-25\times15=-375$

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ISEE Lower Level Math : Operations

Study concepts, example questions & explanations for ISEE Lower Level Math

All ISEE Lower Level Math Resources

Example Questions

Example Question #61 : How To Multiply

Example Question #62 : How To Multiply

Example Question #63 : How To Multiply

Example Question #61 : Operations

Example Question #65 : How To Multiply

Example Question #61 : How To Multiply

Example Question #62 : Operations

Example Question #63 : Operations

Example Question #64 : Operations

Example Question #65 : Operations

All ISEE Lower Level Math Resources

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