In other words, NO MATTER how many significant figures there are in the whole number part (to the left of the decimal place), the answer to problem number 2 will extend only into the tenth place. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. ~(|9VqK 9/C92:M/Wx^b!`N).:+
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Another common error is to use just one rule for both types of operations. 12.
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Multiplying and dividing with significant figures, Addition and subtraction with significant figures, Middle school Earth and space science beta - NGSS, World History Project - Origins to the Present, World History Project - 1750 to the Present. xZ[o7~7QwM
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A very common student error is to swap the two sets of rules. %
__ Remember to check the decimal portions of each number in the problem. Here is what to do: 1) Count the number of significant figures in the decimal portion of each number in the problem. 3) Round the answer to the LEAST number of places in the decimal portion of any number in the problem. An answer is no more precise that the least precise number used to get the answer. J} \WtQ8T #BpuJ)`zk3oZp7$;6pMhLKZ&?o j'JZ&O(oh)rNgX:6?o LM If you're seeing this message, it means we're having trouble loading external resources on our website. 3 0 obj
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Let's do it one more time: imagine a team race where you and your team must finish together. worksheet significant key answer figure homework worksheets calculations msrazz keys WARNING: the rules for add/subtract are different from multiply/divide. For addition and subtraction, look at the decimal portion (i.e., to the right of the decimal point) of the numbers ONLY. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
VFAuj95/rs1C@MezY Khan Academy is a 501(c)(3) nonprofit organization. <>
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[W>D$8`ei8_/,9,AH6;c"aB (The digits to the left of the decimal place are not used to determine the number of decimal places in the final answer.). e8.d`,i"v~STA'7eTyP:hRm4{($a`A>~%~% ,t2XiL`>C?exO4 |?HI#'a
g9'_r'YwE^&{loD{?LH%rbc+.43M7s0(nmprm+k+DTsE,'k, E>MJ_eT{}e In mathematical operations involving significant figures, the answer is reported in such a way that it reflects the reliability of the least precise operation. tB=w|{8D at :se@C^: 0
For example, in the second problem, the 23.1 will dictate the significant figures in the decimal portion of the answer. 
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