1.Nancy has $600 She wants to buy 3 pencils for $400. how much does she have left?

What is asked :
What is given :
what is operation to be used :
what is the number sentence :
what is answer :

ANSWER NOW

note : use estimate and exact

example: estimate exact
12 times 19 = n | 10 times 20 = 200 | 12 times 19 = 1010