# 33-Add-Mult - 3 Divide 18.7623/1.0081 = = = 4 Add 20.987...

This preview shows pages 1–2. Sign up to view the full content.

GCHEM I LAB ADD/SUBSTRACT/ MULTIPLY/ DIVIDE SIF/FIGS CONCEPT PROBLEMS 1) Multiply or Divide ) sig/figs of answer = sig/figs of problem factor w/least number of sig/figs Ex: Multiply: 22.4 x 18.1 = 405.44 S/F = 405 Divide: 243.2/7.5 = 32.42666 S/F = 32 2) Add or Sub places right of decimal = same number places as least precise problem factor Ex: Add: 102.1 + 1.32 + .215 = 103.635 S/F = 103.6 Sub: 26.543 – 22.86 = 3.683 S/F = 3.68 3) Rounding drop digit < 5 retain digit unchanged Ex: 2.34 round to 2.3 drop digit = 5 w/other digits add 1 to retain digit Ex: 8.3517 round to 8.4 drop digit = 5 w/zeros or no digits if retain digit odd add 1 Ex: 8.75 round to 8.8 if retain digit even unchanged Ex: 8.25 round to 8.2 PROBLEM GROSS ANSWER # SIG/FIGS ANSWER Note: * applies to adding and subtracting and significant digits to right of decimal. 1) Multiply: 10.923 x 0.0023 = ______________ = _________ = ___________ 2) Multiply: 0.02403 x 12.0 = ______________ = _________ =___________

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 3) Divide: 18.7623/1.0081 = ______________ = __________ =___________ 4) Add: 20.987 + 43.1 = ______________ = *_________ = ___________ 5) Sub: 123.456 – 10.9 = ______________ = *_________ = ___________ 6) Multiply: 43.86 x 15.753 = ______________ = __________= ___________ 7) Divide: 1250/610 = ______________ = __________= ___________ 8) Add: 23.9865 + 1.8 + 2.56 = ______________ = *_________= ___________ 9) Sub: 200. – 0.0012 = ______________ = *_________= ___________ 10) Divide: 543.9/16.853 = ______________ = ___________=___________ 11) Add: 1.874 + 0.01272 + 12.8458 = ______________ = *__________=___________ 12) Divide: .0043/.04 = ______________ = ___________=___________ 13) Multiply: 3000. x 0.012345 = ______________ = ___________=___________ 14) Sub: 89.61 – 0.0104 = ______________ = *__________=___________ 15) Add: 6.023 + 23.45 + 36.5421 = ______________ = *__________=___________ Jpechunf12/2005...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern