(1)58×2.1=

(2)58×0.21=

(3)5.8×21=

(4)5.8×2.1=

(5)0.58×2.1=

(6)0.58×0.21=

(1)0.05×1.8=

(2)9.2×0.5=

(3)12.1×0.6=

(4)0.25×60=

(1)0.53×0.2=

(2)0.9×0.81=

(3)0.44×25=

(4)5.8×0.4=

(1)0.03×0.4=

(2)0.25×0.8=

(3)3.25×0.01=

(4)0.86×0.3=

(1)9.75×0=

(2)0.21×7=

(3)1.8×0.5=

(4)5.2×0.4=

(1)5×0.9=

(2)13.54×0.2=

(3)2.5×0.4=

(4)0.84×3=

(1)0.3×4=

(2)10×0.37=

(3)2.2×0.4=

(4)2.8×3=