because calculators aren't clever enough and brake or get lost whereas brains don't get lost
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It is different because modern math sometimes uses calculators and traditional math did not have calculators.I think that they used abacuses or other methods such as your fingers
Calculators do not know the answer until you ask them for it; each time you request a result it works through the numbers and operations you have given it and returns one.
those student want to become engineeer. they should learn math.
It means to use pencils and paper, rather than computers, or calculators.
We learn math using numbers because that is math. Also when you get to a higher level in math it is easier to use numbers to write 4,137,985,034.152 than splleing it out.