Basic Fundamentals

Analyze the patterns and solve the equations!

1) Solve
Digit in ones of 218634?
2) Solve
Digit in ones of 121221?
3) Solve
Digit in thousands of 583033?
4) Solve
900000+_+500+10+4=
5) Solve
100000+80000+_+50+8=
6) Solve
Value of 4 in 131041?
7) Solve
Value of 2 in 868328?
8) Solve
Digit in tens of 803326?
9) Solve
600000+_+300+40+2=
10) Solve
200000+80000+_+100+90+8=
11) Solve
Digit in ones of 349584?
12) Solve
_+80000+5000+20+6=
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