1. 直接写得数．

10÷0.01=	0.22+0.8=	10﹣2.05=	3.5×0.4=	4÷0.25=
0÷19.8=	0.2×0.05=	0.6×1.5=	1.36+2.87+3.64=	1.8×0.4×0.25=