Decimals - Add and Subtract Decimals problem solving same decimal place - Presentation

The latest lesson on adding and subtracting decimals focuses on problem-solving with numbers that share the same number of decimal places. Students are encouraged to consider examples of such numbers and engage in a series of activities designed to deepen their understanding. The first activity prompts learners to determine missing numbers in calculations, using a column method and visual representations for support. Counters on a place value grid help illustrate the concept of tenths and ones, guiding students to recognise when an exchange is needed due to the sum exceeding the value of ten tenths.

Further activities involve looking at the tenths column to solve problems, understanding when to perform an exchange, and identifying the missing digits in given calculations. The lesson also includes a word problem where students calculate the total amount of money spent by Esin on a present and a clock, and then determine how much she had originally by using a part-whole model. Another problem-solving scenario involves calculating the total distance walked by Malachi over two days. Students must first find out how much further Malachi walked compared to Rosie on Saturday and then add this to their Sunday walk to find the total distance. Independent work rounds off the lesson, with students applying their skills to work out missing digits and solve word problems using the methods they have learned.