Addition Colour in 0.17 Colour in 0.53 in one colour. 0.18 + 0.25 = Work out 0.55 + 0.28 Colour in 0.42 in another colour Use this to work out Colour in 0.27 in one colour. Colour in 0.45 Colour in 0.59 in another colour Work out 0.25 + 0.25 0.53 + 0.42 = You may need to a 0.1 into ten 0.01. Colour in 0.18 in one colour. Use this to work out Work out 0.25 + 0.25 + 0.25 + 0.25 Colour in 0.12 in one colour. Colour in 0.25 in another colour Colour in 0.33 in another colour You may need to split a 0.1 0.27 + 0.59 = Use this to work out into ten 0.01. Use this to work out Work out 0.75 + 0.58 0.12 + 0.33 = Work out 0.32 + 0.59 Subtraction Colour 0.38 in a light colour. Work out 0.86 - 0.35 = 0.72 0.25 = Work out 0.77 - 0.59 – Cross off 0.21 of the coloured bit. Use this to work out 0.38-0.21 0.53 - 0.42 = Colour in 0.53 in one colour. Work out 0.55 - 0.28 Cross off 0.47 of the coloured bit. You may need to split a 0.1 Colour in 0.72 in one colour. Colour 0.52 in a colour. into ten 0.01. Cross off 0.25 of the coloured bit. Work out 0.5 - 0.25 Cross off 0.41 of the coloured bit. Use this to work out You may need to split a 0.1 Use this to work out into ten 0.01. 0.52-0.41 0.53 0.47 = – Use this to work out Work out 1.37 0.52 –
Addition Colour in 0.17 Colour in 0.45 Colour in 0.12 in one colour. Colour in 0.33 in another colour Use this to work out 0.12 + 0.33 = Colour in 0.53 in one colour. Colour in 0.42 in another colour Use this to work out 0.53 + 0.42 = Colour in 0.18 in one colour. Colour in 0.25 in another colour You may need to split a 0.1 into ten 0.01. Use this to work out 0.18 + 0.25 = Colour in 0.27 in one colour. Colour in 0.59 in another colour You may need to a 0.1 into ten 0.01. Use this to work out 0.27 + 0.59 = Work out 0.32 + 0.59 Work out 0.55 + 0.28 Work out 0.25 + 0.25 Work out 0.25 + 0.25 + 0.25 + 0.25 Work out 0.75 + 0.58 Subtraction Colour 0.38 in a light colour. Cross off 0.21 of the coloured bit. Use this to work out 0.38-0.21 Colour 0.52 in a colour. Cross off 0.41 of the coloured bit. Use this to work out 0.52-0.41 Work out 0.86 - 0.35 = 0.53 - 0.42 = Colour in 0.72 in one colour. Cross off 0.25 of the coloured bit. You may need to split a 0.1 into ten 0.01. Use this to work out 0.72 – 0.25 = Colour in 0.53 in one colour. Cross off 0.47 of the coloured bit. You may need to split a 0.1 into ten 0.01. Use this to work out 0.53 – 0.47 = Work out 0.77 - 0.59 Work out 0.55 - 0.28 Work out 0.5 - 0.25 Work out 1.37 – 0.52
decimat.docx