how to write two tens and nine-tenths in decimal form Share with your friends Share 0 Pooja answered this 2 tens and 9 tenths = 2×10+910=20+0.9=20.9 1 View Full Answer P B Srikar answered this 20.9 i think -1 Manish Kumar answered this 20.9 -1 Megha Vinod answered this 20.9 0