To ADD (or subtract) two numbers in scientific notation that have the SAME powers on the 10, we can just... add the base numbers and keep the same power of 10. add the base numbers and add the powers on the 10. 1 Point
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Apply When subtracting or adding two numbers in scientific notation, why do the exponents need to be the same?
Summary Lesson: Adding and Subtracting with Scientific Notation
Exponents and Scientific Notation
Adding and Subtracting with Scientific Notation
Scientific Notation In scientific notation, all numbers are represented by number with one non-zero digit to the left of the decimal place multiplied by ten raised to the appropriate power. Small number (less than 1) will have negative exponents of 10. Large numbers (greater than 1) will have positive exponents of 10. WORKING WITH SIGNIFICANT FIGURES Addition and Subtraction When adding or subtracting, the number of digits to the right of the decimal point in the answer equals the measurement which has the least number of digits to the right of the decimal point. EXAMPLE: adding: 26.46 this has the least digits to the right of the decimal point (2) + 4.123 30.583 rounds off to* -> 30.58 2 digits to the right of the decimal point EXAMPLE: subtracting: 26.46 - 4.123 22.337 rounds off to -> 22.34 Perform the following additions or subtractions. Report your results to the proper number of significant figures. a) 28 + 16 + 227 = b) 2.222 + 2.22 + 2.2 = c) 81.42-18.4 = d) 4732.3 + 55 + 0.54 = e) 999.0 + 1.7 - 43.7 = f) 564,321 - 264,321 = g) 0.04216 - 0.0004134 =
Susan H.
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