Estimate and check two-step answers

~10 min

Estimate each step to predict a reasonable answer.

Rounding to Estimate

400410420430440450460470480490500

To estimate, round each number in the story to the nearest ten or hundred. Then, perform the addition or subtraction steps with the rounded numbers to find a rough goal for your answer.

💡 Rounding makes the numbers easier to work with in your head.