What is the value of the underlined digit?
45,829 →
67,352 →
253,479 →
Estimate to the nearest ten.
47 + 22 → + =
75 - 24 → - =
Estimate to the nearest hundred.
321 + 584 → + =
935 - 281 → - =
Solve
23 + 54 = 89 - 26 = 72 + 26 =
27 + 35 = 75 - 28 = 46 + 29 =