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🤔️Topic Today：Scientific Notation科學表示法的意義
🚩Key Terms
▶️long numbers長長的數，very large numbers非常大的數，very small numbers非常小的數
▶️scientific notation，a way to express any number as a product of a power of 10 and a decimal greater or equal to1科學表示法，任何數都可以寫成一個大于或等于1的小數和一個10的幂的乘積
▶️standard notation，or regular notation數的正常表示法
▶️estimate the size of very large or very small things估計非常大或非常小的數
▶️compare the size of things比較大小
