Question

There are also different rules for reporting the answer when you add or subtract I) The ansSwer should have the same number of decimal places as that of the number with the least decimal. Example: 4838 g 10023g 5.3853 g 5.385 g 486 58 g - 421. 65 58 g 66g is 0-4, so round down. is 5-9, so round up. NOTE: IN ADDITION AND SUBTRACTION, DECIMAL POINTS MUST BE LINED UP! Solve the following a) 0.00000313 +17 b) 49670 c) 0.000343 d) 78 -3.1 +0.17 99 e) 336.000-33000.03 f) 0.99 I Additional practice problems How many sig. figs in the following number? a) 87 b) 190 c) 0.000190 d) 606.0 e) 1.008 Round off the following to 2 S.F a) 86730 b) 120.99 c) .0003450 d) 0.0555 e) 9898989 How many S.F. should be in the following answers: (Don't work out the problems!) a) 0.2 x 43.98= c) 43.0 17.2 b) 43,000,000 x 0.00546 d) 0.00235 3.0 e) 143.000-345 f) 3.40 x 0.04 g) 0.300 x 802 30.44 h) 39.04 x 1.009 3 i) 000390 х 2.0098%3D 2.02 Solve the following problems: 338855.0 b) 43,2х 303 х 17.0% 43.30 х 0.0045х 99 c) a) 0.004598 +10000000.003 +4 f) 17.0+14-89 e) 8.0 -1.99 d) 73 -14.98 How many S.F. are in the following numbers? c) 420 x 10 b) 0.0090 a) 3.0x 10 f 9.4450x 10 e) 900,000 d) 900,000

Answer 1

Here is the Solution:

o Solve the following: 0.000003 13 (а). +17 17.000003 13 17 4.9670 (b). -3.1 1.867 1.9 0.0003 43 (c).+0.17 0.170343 0.2 78 (d). .99 77.01 77 (e). 336,000 33,000.03 302999.97 303,000 o How many sig. figs. in the following number. (two significant figure). (b). 190. 3 (three significant figure) (c). 0.000190 3 (three significant figure). (three significant figure) 4 (four significant figure) (a). 87 2 (d). 606.0 3 (e). 1.008

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