How do you write $(4 \times 10^{8}) + (2 \times 10^{7})$ $(4 times 10 ^ 8) + ( 2 times 10 ^7)$ in standard from?

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Answer 1 · 2015-10-19T20:58:06

$= 420, 000, 000$ $=420,000,000$

$4 \times 10^{8} = 400, 000, 000$ $4xx10^8=400,000,000$
$2 \times 10^{7} = 20, 000, 000$ $2xx10^7=20,000,000$

$400, 000, 000 + 20, 000, 000 = 420, 000, 000$ $400,000,000+20,000,000=420,000,000$

How do you write (4 times 10 ^ 8) + ( 2 times 10 ^7)(4×108)+(2×107)(4 times 10 ^ 8) + ( 2 times 10 ^7) in standard from?