296,000,000 you underline the digit in the millionth place then circle the digit after it. if the digit is more than 5 add 1 if it is less leave it as it is. Got it?
We have to make an equation: a number increased by 10 is 114.
An equation is:
x + 10 = 114
x = 114 - 10
x = 104.
I cant directly give u the answer but here is some help:
for part a add up and solve the equazions on the whiteboard.
for part b subtract 90 from what you got from part a.
Hope this helps. Sorry i couldnt help more.