Practise using a scientific calculator accurately with powers, roots, fractions and decimals, recording enough display figures.
Use your calculator to work out the value of
Give your answer as a decimal.
Write down all the figures on your calculator display.
Final answer:
0.4778704298…
A1 must have a minimum of 5 decimal places.
M1 for calculating the denominator, an answer with 3 or 4 decimal places, or the correct fraction 1559745.
Work out the value of 42.6−28.9562+983
Write down all the figures on your calculator display.
3167.352831
13.7
231.19(3637)
2
M1 For 3167.35(2831) rounded or truncated to at least 2 decimal places or for 13.7 or for 231.(193....) rounded or truncated to at least 3 significant figures
A1 Accept rounded or truncated to at least 2 decimal places
Work out the value of 12.72.5+3.6+5×3.68.2
Give your answer as a decimal.
Write down all the figures on your calculator display.
Working:
0.48031(4…)+0.45555(5…)
or
12761+9041
Final answer:
0.93587(05162)
M1 for evaluating either fraction correctly as a decimal to at least 5 significant figures, rounded or truncated, or as a simplified fraction, or for an answer of 0.935, 0.936, 0.9358, or 0.9359. A1 for the value correct to at least 5 significant figures, rounded or truncated. Correct answer scores full marks unless from obvious incorrect working.