Standard form

Which of the number is written in standard form? Options: $$50\times10^3$$ , $$3\times10^{-4}$$ , $$3\times10^{2.1}$$ , $$0.9\times10^2$$

Which of the number is NOT written in standard form? Options: $$5\times10^{-3}$$ , $$3.3\times10^7$$ , $$12\times10^8$$ , $$1.9\times10^{-26}$$

Which of the number is equal to $$5.5\times10^4$$ ?

Write 400000 in standard form

Write 0.07 in standard form

Write $$800\times10^4$$ in standard form

$$3\times10^4+6\times10^5$$ in standard form

Write $$3\times10^2\times6\times10^5$$ in standard form

Express $$3\times10^6-6\times10^5$$ in the form $$A\times10^6$$ . Write down the value of A.

Express $$2\times10^{-4}-7\times10^{-5}$$ in the form $$A\times10^{-4}$$ . Write down the value of A.