3 7/8 plus 1 3/4=10 4/8 is this correct?
C collegebound88 New member Joined Sep 25, 2005 Messages 9 Sep 29, 2005 #1 3 7/8 plus 1 3/4=10 4/8 is this correct?
tkhunny Moderator Staff member Joined Apr 12, 2005 Messages 11,339 Sep 29, 2005 #2 collegebound88 said: 3 7/8 plus 1 3/4=10 4/8 is this correct? Click to expand... I think not. 7/8 < 1 and 3/4 < 1 and 3+1+1+1 = 6. Your answer must be less than that. Estimate first. You simply cannot make errors like that with a good estimate. 3 7/8 = (24+7)/8 = 31/8 1 3/4 = (4+3)/4 = 7/4 = 14/8 31/8 + 14/8 = 45/8 = (40+5)/8 = 5 5/8 < 6
collegebound88 said: 3 7/8 plus 1 3/4=10 4/8 is this correct? Click to expand... I think not. 7/8 < 1 and 3/4 < 1 and 3+1+1+1 = 6. Your answer must be less than that. Estimate first. You simply cannot make errors like that with a good estimate. 3 7/8 = (24+7)/8 = 31/8 1 3/4 = (4+3)/4 = 7/4 = 14/8 31/8 + 14/8 = 45/8 = (40+5)/8 = 5 5/8 < 6