Math word problems

Ben needs the sum of 10+12+11. Jack needs the sum of 12+11+10. Who has the sum of 33?

Cindy has 17 stickers. She needs 31 stickers. How many more stickers does she need?

Victor has 12 pencils. He went to the store and bought 15 more. How many does he have now?

9+3=

Elena has 49 robots. She gave 25 of them Elaine. How many robots does Elena have left?

12 boys and 8 girls went on a fieldtrip. How many children went on the fieldtrip?

George read 30 pages of a book. He has 14 pages left to read. How many pages are in the book?

12+9+3=

10+1+12 =

3+5+6=

Jade gave away 18 books. She had 13 left to take home. How many did she start with?