15 tens + 25 ones 1 hundred + 13 tens + 11 ones 17 tens + 28 ones

$$15 \text{ tens} = 15 \times 10 = 150$$ $$25 \text{ ones} = 25 \times 1 = 25$$

$$150 + 25 = 175$$

The answer is $\boxed{175}$

: 1 hundred + 13 tens + 11 ones

$$1 \text{ hundred} = 1 \times 100 = 100$$ $$13 \text{ tens} = 13 \times 10 = 130$$ $$11 \text{ ones} = 11 \times 1 = 11$$

$$100 + 130 + 11 = 241$$

The answer is $\boxed{241}$

: 17 tens + 28 ones

$$17 \text{ tens} = 17 \times 10 = 170$$ $$28 \text{ ones} = 28 \times 1 = 28$$

$$170 + 28 = 198$$

The answer is $\boxed{198}$