We are asked to solve six arithmetic problems: 1. $666 - 8 = ?$

1. Problem Description

We are asked to solve six arithmetic problems:

1. $666 - 8 = ?$

2. $3.7 + 4.008 = ?$

3. $5 \times 6 \times 9 = ?$

4. $1170 \div 13 = ?$

5. $40 \times 500 = ?$

6. $3 \times 9 \times 5 = ?$

2. Solution Steps

1. $666 - 8$

$666 - 8 = 658$

2. $3.7 + 4.008$

$3.7 = 3.700$

$3.700 + 4.008 = 7.708$

3. $5 \times 6 \times 9$

$5 \times 6 = 30$

$30 \times 9 = 270$

4. $1170 \div 13$

We can use long division.

$1170 \div 13 = 90$

5. $40 \times 500$

$40 \times 500 = 4 \times 10 \times 5 \times 100 = 4 \times 5 \times 10 \times 100 = 20 \times 1000 = 20000$

6. $3 \times 9 \times 5$

$3 \times 9 = 27$

$27 \times 5 = 135$

3. Final Answer

1. $658$

2. $7.708$

3. $270$

4. $90$

5. $20000$

6. $135$