Mental Math Challenge: Add the first 10 prime numbers (2, 3, 5, 7, 11, 13, 17, 19, 23, 29) together.

Strategies for quick mental calculations: 1. Break down the numbers into smaller groups to make it easier to add. For example, add 2+3+5+7 first, then add the remaining prime numbers. 2. Look for patterns or shortcuts in the numbers. For example, notice that 2 is the only even prime number, so it can be quickly added to the sum without needing to calculate. 3. Use mental math tricks like rounding or estimating to make the calculations easier. For example, rounding 23 to 20 and 29 to 30 can make it easier to add them together. 4. Practice mental math regularly to improve your speed and accuracy in calculations.