https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/estimate-to-subtract-multi-digit-numbers/v/estimating-when-subtracting-large-numbers 2022-10-06T09:25:13.606060383Z Estimating when subtracting large numbers Use estimation to find reasonable solutions to 2- and 3-digit subtraction problems. video https://cdn.kastatic.org/googleusercontent/TFk4wFixyX9CyaX8x8n3ecurte1HHPeN9CKocEHaaQLjMrowEYAfhCZyz5llKFxEKiuRDwPovR0oufZQIoPGcRY Estimating when subtracting large numbers Use estimation to find reasonable solutions to 2- and 3-digit subtraction problems. https://cdn.kastatic.org/ka-youtube-converted/de2aad2y03g.mp4/de2aad2y03g.mp4 187 Estimate to subtract multi-digit numbers https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/estimate-to-subtract-multi-digit-numbers/e/estimate-to-subtract-multi-digit-whole-numbers 2021-04-29T08:01:37Z Estimate to subtract multi-digit whole numbers Use estimation to find a reasonable solution to multi-digit subtraction problems. Numbers are less than or equal to 1000. Charlotte Auen exercise