Question

先用计算器算出每组前三个算式，再根据规律直接写出后四个算式的得数．

(1)99.99×0.2=________ 99.99×0.3=________ 99.99×0.4=________ 99.99×0.5=________ 99.99×0.6=________ 99.99×0.7=________ 99.99×0.8=________

(2)142.857×2=________ 142.857×3=________ 142.857×4=________ 142.857×5=________ 142.857×6=________ 142.857×7=________ 142.857×8=________

Answer 1

答案：19.998,29.997,39.996,49.995,59.994,69.993,79.992;285.714,428.571,571.428,714.285,857.142,999.999,1142.856