First estimate, then find each sum. 1. 6.2 +0.444=?

Question

2. 7+11.436+3.08
3. 0.33 + 1.11 +3.2
4. $6.15 + $8.86
5. $16.81 + $19.94 + $11.49
First estimate, then find each difference.
6. 8.91 -6.08=
7. 9.1- 6.05=
8. 4-1.29=
9. 9-0.45=

Answer 1

1. 6.2 + .444 is approximately 6.5
6.2 is about 6.
.444 is about .5
6+.5 = 6.5
The exact sum is 6.2+.444 = 6.644

You'd get more answers if you wouldn't post so many questions within a single question.