Decimals and Percentages - Rounding Decimals - Starter

The lesson on Rounding Decimals for Year 5 students during the Spring Term's eleventh week offers a series of engaging mathematical challenges. The starter activity prompts students to apply their understanding of place value and decimal notation. They are tasked with constructing numbers based on given units, such as '50 tens and 9 ones' and '4 thousand and 679 ones'. Additionally, they must calculate the sum of a series of numbers, including '53 ones and 6 hundreds plus 8 thousands, 96 tens and seven ones', and record their answers in standard form.

Another key focus of the lesson is understanding the concept of perimeter, as students are asked to determine the perimeter of a rectilinear shape, with each square on the grid measuring 1cm by 1cm. To further consolidate their decimal knowledge, they are asked to write down numbers in decimal form, such as converting fractions like 1/10, 1/100, and 1/1,000 into decimals. The lesson also includes a practical example where students convert the number '4 ones, 3 tenths, 4 hundredths and 9 thousandths' into decimal form, reinforcing their understanding of the relationship between place value and decimal notation.