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2013-11-26T18:17:52+01:00
A) 18x(100-1)=18x100-18x1=1800-18=1782
b) 34x(100+2)=34x100+34x2=3400+68=3468
c) 123x(1000+1)=123x1000+123x1=123000+123=123123
d) 27x(100-1)=27x100-27x1=2700-27=2673
2013-11-26T18:26:41+01:00
A). 18 x (100 -1) = 18 x 100+ 18 x (-1) = 1800 - 18 = 1782
b). 34 x (100 + 2) = 34 x 100 + 34 x 2 = 3400 + 68 = 3468
c). 123 x (1000 +1) = 123 x 1000 + 123 x 1 = 123000 + 123 = 123123
d). 27 x (100 - 1) = 27 x 100 + 27 x (-1) = 2700 - 27 = 2673