Thanks for reaching out, Letter1234_elly-ya.
It sounds like you'd like to remove multiple photos from your iPad. we can help.
Before we jump in, you should know that "when you delete photos and videos, they go to your Recently Deleted album for 30 days. After 30 days, they'll be permanently deleted. If you use iCloud Photos, and delete photos and videos from one device, the photos and videos will be deleted on your other devices."
You can check out these steps to Delete photos on your iPhone, iPad, and iPod touch. If you need to delete multiple photos, you can do the following:
Open Photos.
From the Library tab, tap All Photos, then tap Select.
Tap multiple photos, or slide your finger across multiple photos to select more than one.
Tap the Trash button
, then confirm to delete the items.
Hope that helps!
Take care.