Max Maths, Year 3, Try it, Subtracting 1-digit numbers from 3-digit numbers with regrouping (1)

In a practical application of subtraction for Year 3 students, the concept of subtracting 1-digit numbers from 3-digit numbers is explored through real-world scenarios. The lesson introduces regrouping, a key skill in subtraction, where tens are converted into ones to facilitate the calculation. For instance, when subtracting a number from a three-digit total such as 417, if there are not enough ones to subtract from, a ten is regrouped into 10 ones. This method is applied to understand how many apples were not sold from a certain amount, leading to the conclusion that 417 apples remained unsold.

The lesson continues with interactive exercises where students use counting blocks to represent items, such as seagulls on a beach or sacks of rice. In the first activity, students start with 244 seagulls and calculate how many are left after 8 fly away. They use counting blocks to visually subtract the 8 and find the remaining number of seagulls. Similarly, in the second activity, students begin with 362 sacks of rice and determine how many are left after selling 6. By representing the sacks with counting blocks, they subtract 6 and work out the final amount of sacks Samir has left. These exercises not only teach subtraction with regrouping but also reinforce the concept through tangible and visual learning aids.