The equation "10 × 20 - 5 × 2 + 1" is already expressed in a concise mathematical form without unnecessary words. The grammar of mathematical notation does not apply in the same way as it does in written or spoken language. However, if you're looking for it to be written out in words with correct grammar, it could be: "Ten times twenty, minus five times two, plus one."

To solve the expression 10*20 - 5 * 2 + 1, we need to follow the order of operations, which is also known as PEMDAS (Parentheses, Exponents, Multiplication and Division - from left to right, Addition and Subtraction - from left to right).

1. First, we perform the multiplication: 10 * 20 = 200.

2. Then, we perform the next multiplication: 5 * 2 = 10.

3. Now, we have the expression 200 - 10 + 1.

4. Next, we perform the subtraction: 200 - 10 = 190.

5. Finally, we perform the addition: 190 + 1 = 191.

Therefore, the value of 10*20 - 5 * 2 + 1 is 191.

The order of operations, or PEMDAS, is an acronym used to remember the steps to solve mathematical expressions. It stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right). This order ensures that expressions are solved in a consistent and logical manner.

In the given expression, we start with multiplication. Multiplication is done from left to right, so we multiply 10 and 20 first, which gives us 200. Then, we multiply 5 and 2, which equals 10.

Next, we move on to subtraction. As per the order of operations, we subtract the result of the multiplication (10) from the previous result (200), which gives us 190.

Finally, we perform the addition operation. Adding 1 to the previous result (190) gives us the final answer of 191.