Computation Race 4

Let's have a race between brains and calculators. If you are using a calculator, you must find answers to all the problems with a calculator. If you're using your brain, you are welcome to use paper.

1.
25
+10
 2.
25
+100
 3.
25
+1000
4.
25
+10,000
 5.
15
x10
 6.
15
x100
7.
15
x1,000
 8.
15
x10,000
 9.
15
+15
10.
150
+150
+10
+10
 11.
1,500
+1,500
 12.
15
+150
13.
15
+1,500
 14.
16,725
+0
 15.
16,725
+3