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How many expressions are there for the number 7?
There are infinitely many expressions for the number 7, as it can be represented in various mathematical forms. Some examples include 7, 3+4, 10-3, 14/2, 2^3, and sqrt(49). These expressions can involve addition, subtraction, multiplication, division, exponentiation, and square roots, among others.
What operations are involved in the expressions 2x plus 7 and 3x plus 6?
Multiplication and addition.
How can a subtraction problem be turned into a addition problem?
When you have a negative number after the subtraction sign it turns in to addition. For example +7 - (-7) = 14 and (-7) - 7 = (-14)
Is 3 plus 7 a numerical expression?
Yes. Anything which you can evaluate (calculate) to get a number is a numerical expression. Thus, all of the following are numerical expressions:5x (if the variable stands for a number)1 + 25 / 3square root of (5 / 3)In general:* Any number* Any variable that stands for a number* An addition, subtraction, multiplication, division, or power that involves numerical expressions is again a numerical expression (as long as the operation makes sense - for example, you can't divide by zero)* Many mathematical functions, with a numerical expression as a parameter - for example, sin(5 + 3), ln(10), etc.
How many addition signs should be put between the digits of the number 987654321 and where should they be put to get a total of 99?
9+8+7+65+4+3+2+1 = 99. So 7 addition signs need to go in 987654321 to get a total of 99.
