SOLUTION: it's really about fctors but I can't find it so my question is how to solve this problem: 7*13+8*13+5*13 can you please solve it or instructions thanks

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Question 17645: it's really about fctors but I can't find it so my question is how to solve this problem: 7*13+8*13+5*13 can you please solve it or instructions thanks
Found 2 solutions by lanntann, rapaljer:
Answer by lanntann(3) (Show Source):
You can put this solution on YOUR website!
Hi, hope I'm understanding the question correctly. Looks like an order of operations situation to me.
Remembering that multiplication is to be performed first (in order from left to right), the problem could be rewritten as such: (7*13)+(8*13)+(5*13).
Working out each set of parentheses, you would then have (91) + (104) + (65). Adding the three together your answer would be 260.

Answer by rapaljer(4671) (Show Source):
You can put this solution on YOUR website!
I have a feeling that whoever made up or assigned this problem had in mind to use the distibutive property to factor out the common factor of 13.

7*13+8*13+5*13 = 13*(7+8+5), which is 13*20 or 260, and you can almost do it in your head.

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