High-speed Mathematics |
Contents
CHAPTER ITHERE IS A SHORTCUT FOR VIR | 5 |
A SHORT WAY OF MULTIPLYING BY NUMBERS WHICH | 19 |
QUICK WAYS OF DEDUCTING THE PERCENT RATES OF 20 | 20 |
Copyright | |
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25 cents acres aliquot approximately average barrels bill breakdown method bushels butter fat calculation cents equals Chapter Compute the answer Compute the cost Compute the number Compute the weight computed mentally contains conventional method cubic feet cubic foot cubic inches cubic yards decimal deduct difference divisor double-and-halve method dozen drill fabric exact multiple exactly divisible Example factors figures Find the cost Find the product following illustration following problems fraction gallons grams gross profit gross units Hint instance kilograms less 20 long ton machine manufacturer method of multiplication minus multi multiplicand multiplied and divided multiplied by 11 nearest Note number added obtained ordinary interest ounces partial products pencil and paper per-cent rates pound sterling pounds procedure purchased quantity reader selling price short method short ton short-cut simple Solution square feet square foot square inches subtract technique tenth tons total number unit digit whole number zeros