If she knit 8 sweaters on Monday and 2 more on Tuesday, she knit 8+2 = <<8+2=10>>10 sweaters on Tuesday.
The total number of sweaters she had knit on Monday and Tuesday is 10+8 = <<10+8=18>>18
On Wednesday, she knit four fewer sweaters than the number she knit on Tuesday, which totals 10-4 = <<10-4=6>>6 sweaters.
By Wednesday, she had knit 18+6 = <<18+6=24>>24 sweaters.
On Thursday, she knit the same number of sweaters she had knit on Thursday, giving a total of 24+6 = <<24+6=30>>30 sweaters.
On Friday, she knit half the number of sweaters she had knit on Monday, which totals 1/2*8 = <<8*1/2=4>>4 sweaters on Friday.
So far, she has knit 30+4 = <<30+4=34>>34 sweaters by Friday.
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