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OpenStudy (ttop0816):
7 · 15 can be written as _____. 5(7 + 10) 10(7 + 5) 7(10 + 5)
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OpenStudy (anonymous):
7(10+5)
OpenStudy (anonymous):
please do not just give answers.
OpenStudy (calculusxy):
A easy trick can be to just find the product of 15*7. Then with that product see which product equals to the ones written on the answer choices.
OpenStudy (anonymous):
because 7*15=105 and 7(10+5)=105
OpenStudy (anonymous):
7 * 15 = 105 so: 5(7 + 10) 35 + 50 85 > NO 10(7 + 5) 70 + 50 120 > NO 7(10 + 5) 70 + 35 > 105 YES 105
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OpenStudy (anonymous):
* typo * do not mind the 105 at the way bottom. lol sorry.
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