In maths, the children are learning to take-away by drawing their own number lines. Take away 10 from a 2-digit number to begin with and show this on a number line. Draw the jump underneath, starting on the right hand side so that it shows a jump backwards for subtraction. If your child is really confident at taking away 10, choose a teens number and show the jump of 10 and then take away the units. Encourage your child to use their mental maths.