3000 + 20 = 3020
Standard form just implies you write out the number numerically (as in 3020 and not three-thousand and twenty. So the answer is just 3020.
360,420 is the standard form of 300000 plus 60000 plus 400 plus 20.
429
26
67 003 422. You're probably doing homework, right?
730520
20 + 5 = 25
In standard form, the answer is 2.346021*10^6.
25.801
34
The standard form of 20 is 2.0 × 101
20 in standard form is 2.0 × 101
25070304