Problem solving using the column method

Maths

Problem solving with integer addition and subtraction

Select the equation below that matches this maths story: '87 315 cars were sold over the weekend. 12 872 of these cars were new and the rest were secondhand. How many cars were secondhand?'

Regrouping has not taken place correctly in more than one column.

The digits in the columns have not been aligned correctly.

The numbers have been added instead of subtracted.

The numbers have been switched around when subtracting.

2. Describe the error that has been made in the following calculation: 213 876 - 114 689 = 328 565.

3. Write out the following column method calculation and describe the error that has occurred: 562 088 - 134 199 = 432 111.

Check your answer against the estimate to see whether they are similar.

Create a word problem with the numbers that you have used in your calculation.

Recalculate the answer using a different method.

Use the inverse method to confirm your answer.

Which of the following methods is NOT a sensible way of checking to see whether we have made an error using the column method?

5. What is the missing number in the following equation: 435 629 + _________ = 772 345

Which equation could be used to estimate the answer to: 653 098 - 118 542?

The digits in the ones and hundreds columns.

The digits in the ones and thousands columns.

The digits in the thousands and ten thousands columns.

Which columns would require regrouping when column subtracting: 563 357 - 325 129?

3. Use the column method to calculate the answer to: 561 998 - 138 422 =

4. Use the column method to calculate the answer to: 183 609 - 21 788 =

Bar modelling helps us practise drawing straight lines.

Bar modelling offers us a chance to draw a nice picture to match our maths questions.

Bar modelling offers us a chance to represent equations in a different way which can help us to solve them.

Bar modelling tells us when our answer is incorrect.

Problem solving using the column method

Lesson outcome