Problem 25

Sir Cameron and Sir Connor cleaned the rust off of helmets by rolling them in the sand.

Cameron could clean 13 helmets in one day, and Connor could clean 10 helmets in one day.

After 7 days, how many more helmets would Cameron have cleaned?

Step 1. What does the problem ask you to find?

1. How many helmets could Sir Connor clean in 7 days?
2. How many helmets could Sir Cameron clean in 7 days?
3. How many more helmets could Sir Cameron clean after 7 days?
4. How many feathers were in a helmet's crest?

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Step 2. What information is needed to solve the problem?

1. The number of days they cleaned helmets
2. The number of helmets Cameron cleaned daily
3. The number of helmets Conner cleaned daily
4. .The number of grains of sand in a bucket

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Step 3 Select the correct expression.

1. (13 + 10) x 7
2. 13 x 7 -10
3. 10 x 7 -13
4. (13 -10) x 7

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Step 4. Select the correct solution.

1. 161
2. 81
3. 57
4. 21

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