2 tens + 3 tens = (a)   tens

20 tens = (a)   hundred

190 = (a)   tens

1 thousand = (a)   hundreds

43,42,41,40, (a)  

23 + 40 =

(a)  

39 + (a)   = 99

95 - (a)   = 65

Ms. Gower baked 39 cookies. Ms. Gower and her mom ate 10 cookies. How many cookies does she have left?

Ms. Gower has (a)   cookies left.