0.2×50= 2.4×0.5= 0.25×4= 12.5×0.8= 1.8×0.4= 1.7×0.6= 0.15×4= 3.2×0.3=
①0.69×99
②0.125×3.2×2.5
③0.99×9+0.99
④5.6×1.25
⑤1.63×1.73-1.63×0.73
⑥101×0.43