need help solving these in dimensional analysis first turning them into  proper scientific notation and significant figure 1. Add 237.45 and 77.555 2. Multiply 67.884 times 0.000358 3. Divide 55.991 by 32

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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need help solving these in dimensional analysis first turning them into  proper scientific notation and significant figure

1. Add 237.45 and 77.555
2. Multiply 67.884 times 0.000358
3. Divide 55.991 by 32
4. Divide 0.0071 by 668.3
5. Multiply 71170 times.0.00800
6. Add 65 and 72.6, then multiply by 22.107 and divide by 6

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