20 questions / Round to the nearest ten Round to the nearest hundred Ballpark estimate the sum Ballpark estimate the difference
20 questions / Round to the nearest ten Round to the nearest hundred Ballpark estimate the sum Ballpark estimate the difference
20 questions / Round to the nearest ten Round to the nearest hundred Ballpark estimate the sum Ballpark estimate the difference
20 questions / Round to the nearest ten Round to the nearest hundred Ballpark estimate the sum Ballpark estimate the difference