I would change all of these to km. Note that with no period after the 80,000 mm. that has only one s.f.
0.000035 km
0.0083 km
75.341 km
0.08 km
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75.429335 which I would round to 75.43
1. 35cm + 8.3m + 75.341 km + 80,000 mm = ____________
2.(43.7m + 39.3cm) ÷ 25.332 m/s = _____________
* focus on significant figures
3 answers
is # 2.(43.7m + 39.3cm) ÷ 25.332 m/s = _____________
1.741 seconds then?
1.741 seconds then?
43.7 has only 3 s.f.
Add that to 0.393 for an answer with 3 s.f. and divide by 4 s.f. so you may have only 2 in the answer. 1.741 has 4 which is one too many.
Add that to 0.393 for an answer with 3 s.f. and divide by 4 s.f. so you may have only 2 in the answer. 1.741 has 4 which is one too many.