## Short-cut MathCan you multiply 362 x .5 quickly in your head? Could you readily calculate the square of 41? How much is 635 divided by 2«? Can 727,648 be evenly divided by 8? |

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math book

## Short-cut MathCan you multiply 362 x .5 quickly in your head? Could you readily calculate the square of 41? How much is 635 divided by 2«? Can 727,648 be evenly divided by 8? |

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math book

100 and subtract 25 Solution add the number aliquot answer Proving answer Short casting out 9's CATALOG OF DOVER cent change the number check your answer column decimal point digit sum divide a number divide by 100 divide the number dividend divisible by 9 DOVER BOOKS easy ending in zero equivalent to dividing evenly divisible Example factors faster and easier ﬁgures ﬁnd it easier ﬁrst digit GUSTAV STICKLEY halve the number higher number illustrations larger divisors larger number last digit last two digits lower number Martin Gardner Method for Multiplying Mixed Numbers move the decimal Multiple of 9 multiply a number multiply by 100 multiply the number number by 100 number by 75 Number Divide Number Ending number is evenly number multiplied number's digits original number photographs problem Proving the answer quotient short-cut simplify simply small numbers Solution by steps subtract the number Test for Divisibility whole number