Write the following numbers in standard form.
10. 400,000 + 50,000 + 5,000 + 50 +0.5 +0.005
11. 2,000 + 10 +4+ 0.1 +0.01 +0.003
12. 600,000,000 + 40,000 + 4,000 + 0.004
13. 30,000,000 + 900,000 + 10,000 + 0.5
14. 1,000 + 20 + 1 + 0.001 + 0.0009