Addition and subtraction - Subtract one from two-digit numbers - Worksheet

The lesson titled "Subtract 1-digit from 2-digits" is a focused mathematical exercise aimed at enhancing children's ability to perform subtraction using a variety of methods. The National Curriculum objective for this lesson is to enable students to subtract numbers using concrete objects, pictorial representations, and mental calculations, which includes subtracting ones from a two-digit number. To facilitate learning, the lesson requires differentiated worksheets, teaching slides, and number lines as resources. Essential vocabulary such as 'subtract', 'place value', 'columns', 'number line', 'tens', 'ones', 'subtraction', '1-digit', '2-digits', 'partition', and 'number bonds' are introduced to help students understand and articulate the concepts being taught.

Understanding place value is crucial for subtraction, as is the ability to count to 20 and partition two-digit numbers. The lesson encourages students to differentiate between one-digit and two-digit numbers and align them correctly in columns. Mastery of number bonds is also essential to use the number line effectively. The lesson presents various activities, including fluency and precision exercises where students practice subtraction by counting back from a larger number and reasoning and problem-solving tasks that involve matching number sentences with number bonds. The lesson progresses from working towards understanding to achieving greater depth, with arithmetic problems that range from within 40 to within 100, crossing the ten. The lesson culminates in a reflection on the efficiency of different methods of subtraction and the common errors that may occur, such as incorrect counting back on a number line.