0.56 x 2.5 = 0. 14 * 4 * 2.5 = 0. 14 * 10 = 1.4

14.28÷0.7x 2.56 = 2.04 * 7/0.7 * 2.56 = 20 * 2.56+0.4 * 2.56 = 5 1.2+ 1.24 = 52.44

1.57 x 6.4+3.6x 1.57 = 1.57 *(6.4+3.6)= 1.57 * 10 = 15.7

10÷0. 1x 9.05-26 = 10 * 10 * 9.05-26 = 905-26 = 879

10.2x9.8=( 10+0.2)*( 10-0.2)= 10^2-0.2^2= 100-0.04=99.96