0.34 1.42 1.18 0.94 Working with decimals Complete this magic square. S1.1 Support Starter Complete this magic square. Is the square still magic if all the numbers are rounded to one decimal place? Investigate. What if the numbers are rounded to the nearest whole number? 0.34 1.42 1.18 0.94 Preamble This activity practises decimal addition and subtraction, and rounding. In some cases, it may be appropriate for pupils to investigate the effect of rounding without solving the magic square first. Possible content Addition and subtraction of decimals. Rounding decimals to one decimal place and to the nearest whole number. Resources None. Solutions/Notes Rounding will not produce a magic square in this case. 0.34 1.78 1.42 2.26 1.18 0.1 0.94 0.58 2.02 0.3 1.8 1.4 3.5 2.3 1.2 0.1 3.6 0.9 0.6 2.0 2 1 3 4