Q1) Estimate the answers for the following calculations.
a) 34679039 - 15236579
b) 45768908 + 67789 + 987
c) 56789 X 919
d) 4567894 ➗ 65
Q2) Find the difference between the greatest 8-digit number and the sum of the greatest 6-digit number and the greatest 4-digit number.
Q3)
Q4)