The second puzzle has 1000*.5=<<1000*.5=500>>500 more pieces than the first
So it has 1000+500=<<1000+500=1500>>1500 total pieces
That means those two puzzles have 1500*2=<<1500*2=3000>>3000 pieces
So in total there were 3000+1000=<<3000+1000=4000>>4000 pieces
#### 4000