Max Maths, Year 4, Work Book, Bridging 100s

In Practice 4 of the Max Maths Year 4 workbook, students are encouraged to strengthen their mental arithmetic skills, particularly focusing on 'Bridging 100s'. This exercise is designed to help students become adept at adding and subtracting numbers that are close to multiples of one hundred. The use of a number line is suggested as a visual aid to assist them in understanding how numbers can be broken down and recombined in a manner that makes calculation easier.

The questions provided in the workbook are a mix of addition and subtraction problems. For instance, in question (a), students are asked to add 9 to 899, which requires them to understand how to move past the hundred boundary to reach a new hundred. Similarly, question (b) challenges them to add 5 to 196, again crossing the hundred threshold. The subtraction problems, like (e) 904 minus 5, (f) 605 minus 6, and (g) 706 minus 7, require the students to subtract small numbers from just over a hundred, helping them to visualise and calculate the resulting numbers that fall just below a hundred. The goal of these exercises is to build confidence in handling numbers around these pivotal points and to develop quick and accurate mental calculation strategies.