When going to school, she saw 40+20 = <<40+20=60>>60 animals.
The number of beavers doubled to 20*2 = <<20*2=40>>40 beavers
The number of chipmunks decreased to 40-10 = <<40-10=30>>30 chipmunks.
The total number of animals she saw on that day is 30+40+60 = <<30+40+60=130>>130 animals
#### 130