https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/estimate-to-add-multi-digit-numbers/v/estimating-adding-large-numbers-by-rounding 2023-06-01T14:45:55.494628927Z Estimating when adding multi-digit numbers Let's learn about estimating when adding multi-digit numbers. We see how to round numbers to the nearest 10 and then add them together to get an approximate sum. This technique is helpful for us when we need to make quick mental calculations and don't require an exact answer. video https://cdn.kastatic.org/googleusercontent/IJjQoKIpkSb7MOlzURIQuzBP2g4j0MJI7jk1D-jlWjj1MxrkPNVgNOv1pV3TqDqSqvOuHfO3c4ZMs-hYDNSmH0qI3w Estimating when adding multi-digit numbers Let's learn about estimating when adding multi-digit numbers. We see how to round numbers to the nearest 10 and then add them together to get an approximate sum. This technique is helpful for us when we need to make quick mental calculations and don't require an exact answer. https://cdn.kastatic.org/ka-youtube-converted/CZuYBGBClG0.mp4/CZuYBGBClG0.mp4 220 Estimate to add multi-digit numbers https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/estimate-to-add-multi-digit-numbers/e/estimate-to-add-multi-digit-whole-numbers- 2025-06-24T14:43:14.98588327Z Estimate to add multi-digit whole numbers Use estimation to find a reasonable solution to multi-digit addition problems. Numbers are less than or equal to 1000. Lindsay exercise