Rounding and Estimation for Addition and Subtraction

Round the number 56 to the nearest 10

Round the number 82 to the nearest 10

Round the number 134 to the nearest 10

Round 345 to the nearest 10

Round 467 to the nearest 100

Round 233 to the nearest 100

Use rounding to the nearest 10 to estimate

Use rounding to the nearest 10 to estimate 271+425

Use rounding to the nearest 100 to estimate

Solve the problem using an open number line

45 + 23 =