first u do 1+3+4 which gives u 8...then divide it from the number 56 which gives u 7..then after do (multiplication) 1*7= £7...then 3*7=£21 and then 4*7=£28....ur answer is £7.00, £21.00 and £28.00.....to check them if it's right u could do 7+21+28 which gives u exactly £56.00...so yap hope this helped u :)