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Name: _____________________ Date: ________ Block: _______5706717256788Determining Significant Figures/Calculating with Significant Figures ANSWER KEY ***Label the Pacific and Atlantic Oceans by the United States picture Indicate how many significant figures there are in each of the following measured values. 246.32 __5__ b) 107.854 __6__ c) 100.3 __4__ d) 0.678 __3__ e) 1.008 __4___ f) 0.00340 __3___ g) 14.600 __5__ h) 0.0001 __1___ i) 700000 __1__ j) 350.670 __6____ k) 1.0000 __5__ l) 320001 __6__Write the rule to follow for determining the amount of significant figures in your answer when adding and subtracting. _______Your answer should contain as many numbers after the decimal place as the least accurate of the numbers you are adding or subtracting. ________________________________________________________Calculate the answers to the appropriate number of significant figures. 32.567 b. 246.24c. 658.0 d) 3475.32135.0 238.278 23.5478 28.98+ 1.4567 + 98.3__ + 1345.29__ - 1.6__ 169.0 582.2 2026.8 3444.7Write the rule to follow for determining the amount of significant figures in your answer when multiplying and dividing. ___Your product should contain as many significant figures as the number that your multiplying (or dividing) that has the least amount of significant figures._________________________________________ Calculate the answers to the appropriate number of significant figures. 23.7 x 3.8 = __90.____ f) 1.678 / 0.42 = _4.0____45.76 x 0.25 = __11____ g) 28.367 / 3.74 = __7.58____81.04 x 0.010 = _0.81____h) 4278 / 1.006 = _4252___6.47 x 64.5 = __417____i) (6.8 + 4.7) x 17.44 = __201____ 43.678 x 64.1 = __2.80 x 103___ j) (6.8 + 4.7) x 17.44 = _201__ Multi-Step Problems: k) (320. – 22.7) x 3.8 = _1.1 x 103___(14.86 + 13.7) x (65.346 – 4.10) = ___159_____ (43.888 – 32.888) ................
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