It depends on the number of significant figures from two numbers you are multiplying. But when multiplying you use the same number of significant figures from the numbers you are multiplying with the LEAST number of significant figures.
Example:
92,873.239 * 2 = 200,000 (because the number 2 has only 1 significant figure even tho 92,873.239 has 8 significant figures your answer still only has 1 significant figure)
Chat with our AI personalities
2.7 X 106 ======= Zeros are superfluous unless needed for significant figures.
three - the first being 5 then 4 and 6 the noughts (0) dont meen anything in maths - they are just a place holder - in this number they arnt even needed! significant figure (SF)
All jobs.
The Arabic people needed a numeral system and made figures, numbers. They based their system off of zero and also made negatives that the Roman numerals lack.
It is only not needed if you know of another method. If FOIL is the only way you know to multiply two binomials, then it is definitely needed.