Use place value to find 10 and 100 more or less than any given number

ArithmeKit activities are designed to enhance students' understanding of place value by teaching them how to find 10 and 100 more or less than any given number. For instance, if we take the number 123 and want to find 10 more, we simply add 10 to arrive at 133. Continuing this pattern, adding 10 to 133 gives us 143, and so on. The same principle applies when finding 10 less than a number, such as subtracting 10 from 193 to get 183. These exercises encourage students to recognise patterns and understand how the digits in each place value position affect the overall number.

In addition to these calculations, the ArithmeKit includes problems that require students to fill in missing digits to make statements true. This could involve using each digit from 0 to 9 once to complete a set of equations. For example, when we subtract 10 from 277, we get 267, and when we add 100 to the same number, we get 377. These exercises help students to see the consistent change in the tens or hundreds place and to understand the effects of adding or subtracting multiples of 10 and 100. Through these activities, students can explore the sometimes, always, or never true nature of place value statements and use practical examples to demonstrate their understanding.