Solve 100-(1+2+3+4+5+6+7+8+9+10)

$$100-(1+2+3+4+5+6+7+8+9+10)$$

Evaluate

$$45$$

Solution Steps

Add 1 and 2 to get 3.

$$100-\left(3+3+4+5+6+7+8+9+10\right)$$

Add 3 and 3 to get 6.

$$100-\left(6+4+5+6+7+8+9+10\right)$$

Add 6 and 4 to get 10.

$$100-\left(10+5+6+7+8+9+10\right)$$

Add 10 and 5 to get 15.

$$100-\left(15+6+7+8+9+10\right)$$

Add 15 and 6 to get 21.

$$100-\left(21+7+8+9+10\right)$$

Add 21 and 7 to get 28.

$$100-\left(28+8+9+10\right)$$

Add 28 and 8 to get 36.

$$100-\left(36+9+10\right)$$

Add 36 and 9 to get 45.

$$100-\left(45+10\right)$$

Add 45 and 10 to get 55.

$$100-55$$

Subtract 55 from 100 to get 45.

$$45$$

Factor

$$3^{2}\times 5$$