Max Maths, Year 4, Learn together, Review of adding and subtracting 2-digit numbers

In Max Maths Year 4, students revisit the foundational skill of adding and subtracting two-digit numbers. The lesson begins with a practical example involving coloured pencils; one box contains 36 pencils, while another has 28. To find the total number of pencils, students can use counting blocks to visualise the addition process. By grouping ten ones blocks into a ten block, they learn to simplify the calculation, transforming 36 + 28 into 50 + 14, which equals 64 pencils in total. This approach helps students to understand the concept of regrouping in addition.

The lesson continues with the column method, a more traditional approach to addition. Students start by adding the ones column: 6 ones plus 8 ones equals 14 ones. This is then regrouped into 1 ten and 4 ones to maintain place value. The next step involves adding the tens column: 3 tens plus 2 tens, plus the regrouped 1 ten from the ones column, resulting in 6 tens. By stacking the numbers vertically and adding each column separately, students can clearly see how the ones and tens are combined to reach the final sum of 64. Through these steps, the lesson reinforces the importance of place value and the process of carrying over in addition.