Oooof what a class on long division; lots to review so here we go:
Key Terms: divisor, dividend, quotient, remainder.
Cool Terms: obelus is the name for the ÷ symbol, vinculum is the name for the line that separates the numerator from the denominator
Helpful hints: Dracula Must Suck Blood,
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and the ABBA rule: a ÷ b is the same as b ) a
Long Division with really big divisors (2 digits and more); make a little table (x2, x4, x5).
Suppose we had:
To help us build our "18" times tables...
18 x 2 = 36 (just double 18)
18 x 4 = 72 (just double 36)
18 x 5 = 90 (just add 72 and 18)
Now I can use this to find 18 x 3, 18 x 6, 18 x 7, 18 x 8, 18 x 9
18 x 3 = 36 + 18
18 x 9 = 90 + 72
18 x 7 = 90 + 36
Once I have the little table, it helps me speed up my processing time for long division; a good investment of time.
Remember to always calculate to 2 decimal places
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