150935
70000 + 80000 + 900 + 30 + 5 = 150935
80,740
No
It is 8.061*104.
It is already in standard/notation form as written.
2,070,173,810
800008888 in standard form is 800,008,888
80,000
123,009
4678
80,740
680,010
No
7.004 × 1010.
Assuming those were added, the standard form is: 2,070,173,810
50,800,034
It is 8.061*104.
Assuming those were added, the standard form is: 2,070,173,810