Students estimate a subtraction problem, share their methods, discuss the rounding one number method, and then do more problems by rounding one number.
For this NEMP task students calculate ratios, fractions, and percentages of numbers to solve problems involving numbers of blue and yellow bears. A sheet of coloured bears is provided.
Students calculate the cost of several cans of soft drinks, the maximum number bought for a given cost, and the change given after buying several cans.