Decimals - Adding Decimals within 1 (1) - Worksheet

This worksheet focuses on the concept of adding decimals within one whole, specifically targeting Year 5 students. The exercises are designed to enhance pupils' understanding of decimal place values, including tenths, hundredths, and thousandths. Initially, children use place value counters and charts to support their learning, without the need to exchange between columns. They practice adding one more tenth, hundredth, or thousandth to a given number, reinforcing the idea that, for example, 0.45 represents 45 hundredths. A hundred square is also utilised as a visual aid to help in adding decimals, where each square represents one hundredth of a whole.

As students progress, they encounter more complex tasks involving exchanging during addition and completing a variety of calculations using a 100-square grid. The worksheet encourages reasoning and problem-solving by asking children to find missing numbers in sums of three decimal numbers and to represent calculations in multiple ways. Fluency and precision are emphasised through questions that require students to determine what number is shown on a place value chart, to calculate one hundredth or one tenth more, and to understand how many units can be added before the next place value increases. The worksheet concludes with true or false statements that challenge students to apply their knowledge of adding decimals within one whole, further solidifying their understanding of decimal place value and addition.