Solve the following addition problems involving meters and centimeters:

$$5 \text{ m} + 7 \text{ m} = 12 \text{ m}$$

The total is $\boxed{\text{12 m 71 cm}}$.

2.

$$7 \text{ m} + 5 \text{ m} = 12 \text{ m}$$

The total is $\boxed{\text{12 m 61 cm}}$.

3.

$$99 \text{ cm} + 11 \text{ cm} = 110 \text{ cm}$$

Since $100 \text{ cm} = 1 \text{ m}$, $110 \text{ cm} = 1 \text{ m } 10 \text{ cm}$.

$$31 \text{ m} + 21 \text{ m} + 1 \text{ m} = 53 \text{ m}$$

The total is $\boxed{\text{53 m 10 cm}}$.

4.

$$18 \text{ m} + 12 \text{ m} = 30 \text{ m}$$

The total is $\boxed{\text{30 m 31 cm}}$.

5.

$$19 \text{ m} + 29 \text{ m} = 48 \text{ m}$$

The total is $\boxed{\text{48 m 30 cm}}$.

6.

$$33 \text{ m} + 21 \text{ m} = 54 \text{ m}$$

The total is $\boxed{\text{54 m 90 cm}}$.

7.

$$41 \text{ m} + 58 \text{ m} = 99 \text{ m}$$

The total is $\boxed{\text{99 m 98 cm}}$.

8.

$$116 \text{ m} + 28 \text{ m} = 144 \text{ m}$$

The total is $\boxed{\text{144 m 44 cm}}$.

9.

$$89 \text{ cm} + 20 \text{ cm} = 109 \text{ cm}$$

Since $100 \text{ cm} = 1 \text{ m}$, $109 \text{ cm} = 1 \text{ m } 9 \text{ cm}$.

$$35 \text{ m} + 31 \text{ m} + 1 \text{ m} = 67 \text{ m}$$

The total is $\boxed{\text{67 m 9 cm}}$.

10.

$$58 \text{ m} + 35 \text{ m} = 93 \text{ m}$$

The total is $\boxed{\text{93 m 29 cm}}$.