NOTATION AND NUMERATION. 221 



6. Special rules for examples a, b, c and d. 



Rule for example (a). In (a) there are two deci- 

 mal places in the multiplicand (the cipher dofes not 

 count) and only one in the multiplier ; hence 2-f-l= 

 3 decimal places are to be pointed off in the product 

 (disregarding the cipher (0) to the right of last 

 figure not a cipher). 



Rule for example (b). In (b) there is no decimal 

 place in the multiplicand, but four in the multiplier. 

 Therefore 4 decimal places are pointed off in the 

 product. 



Explanation and Solution of Problems (a) and (b). 



(a). Multiply .250 by .10 

 Multiplicand .250 

 Multiplier .10 



Product .025 Ans. 



(b).' Multiply 258. by .0008 

 Multiplicand 258. 

 Multiplier .0008 



Product .2064 Ans. 



Rule for example (c). In (c) there are 3 decimal 

 places in the multiplicand and none in the multi- 

 plier, therefore 3 decimal places are to be pointed 

 off in the product. 



Rule for example (d). In (d) there are 3 decimal 

 places in the multiplicand and 2 in the multiplier. 

 Therefore 3-{-2=5 decimal places are to be pointed 

 off in the product. 



