4th grade math
posted by charlee .
how can thinking about 90 tens help you with 1901297?
the last posted answer was no correct...it came home marked WRONG...please help!!??

What was the correct answer?
This reminds me of The Music Man. 
Are you sure you copied the problem correctly? Is it possibly 901 (not 1901)?

it says 1901297
and there's another one...
how could thinking about 200 tens help you find 20041559?
i'm totally stumped...thanks for your help! 
Your second question makes more sense.
200 tens is 2,000.
200 tens minus 150 tens = 50 tens = 500 
It said explain why seven times eight is not a nuber sentence.

31*19=

589

i am a two digit number .my tens digit is 4 more then my ones digit .if you multipil me by 5, the estimate product is 300 .what am i

62

800