Subtract ten from a number

The ArithmeKit from Buzzard Publishing, as part of the CanDoMaths series, provides a range of activities designed to bolster the arithmetic skills of learners, specifically focusing on the subtraction of ten from various numbers. The exercises range from simple calculations such as '14 - 10 = 4' to more complex tasks that require the learner to recognise patterns, such as when subtracting ten from numbers ending in five, the result consistently ends in a five ('85 - 10 = 75', '75 - 10 = 65', etc.). This pattern recognition extends to numbers ending in two, highlighting a consistent drop in the tens place while the ones place remains unchanged ('72 - 10 = 62', '62 - 10 = 52', and so on).

In another section, the material challenges learners to explore the concept that subtracting ten from a number does not alter the ones digit. For example, subtracting ten from numbers such as '22', '78', or '93' results in '12', '68', and '83', respectively, demonstrating that the ones digit remains the same. The resource also encourages critical thinking through the use of missing digit problems, where learners use digits 0-9 to solve subtraction problems, ensuring that each digit is used only once. This not only reinforces subtraction skills but also promotes logical reasoning and problem-solving abilities.