2.4×4= 1.4×0.3= 0.6×0.15= 2.5×0.4=
0.8×0.9= 0.7×0. 5= 2. 4×0. 5= 1.25×0.8 =
×=515 ×=515
×=51.5 ×= 51.5
×=5. 15 ×= 5. 15
×=0. 515 ×=0.515