Rounding to estimate

Maths

Adding and subtracting using the column method.

Rounding numbers in an equation to provide an approximate answer before calculation.

Using decimal numbers in addition equations.

Using whole numbers in addition equations.

Round '456 244' to the nearest multiple of 10 000.

3. Using rounding to the nearest multiple of 10 000 to estimate the answer to: 341 782 + 456 913 =

4. Use rounding to the nearest multiple of 1000 to estimate the answer to: 187 221 + 243 891 =

Rounding to estimate always takes much longer than actually calculating the answer.

Rounding to estimate decreases the accuracy of your answer: your estimated answer will either be greater or less than your actual answer.

Rounding to estimate does not allow you to subtract.

Rounding to estimate makes equations harder to calculate.

What is one of the problems associated with rounding to estimate?

Which equation demonstrates how the number 346 000 can be partitioned?

2. Use partitioning to solve the equation: 723 000 + 15 000 =

3. Use partitioning to solve the equation: 456 000 - 132 000 =

4. Use partitioning to solve the equation: 158 000 + 26 000 =

5. Use partitioning to solve the equation: 738 000 - 156 000 =