That word "equals" in there makes it an equation.
60 - 20 = 20 + 20=============
80 - 10 = 30 + 40Both sides of the sum now equal 70.
The variable is x.
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12 plus 0 is 12
three plus seven equals ten
forty plus one
The number of protons plus the number of neutrons equals the atomic mass (mostly).
How about: 0.7 plus 0.09 = 0.79
Unless I'm misunderstanding the question, 1 plus 1 plus 1 equals 3 CAN be written as a multiplication sentence: 1 times 3 equals 3.
One plus one equals is to two. This is a mathematical expression in a sentence.
The number ten plus the number nine equals the number nineteen.
What is the number of integral solution to x plus y plus z equals 100?
The number is 21.
The number 353 plus the number 783 equals 1136.
1 plus 1 equals one fact
Yes it does, since 1 (an odd whole number) plus another 1 equals 2 (an even whole number). So only 2 plus an odd whole number equals a consecutive odd whole number. 1 plus 2 equals 3. 3 plus 2 equals 5. And so on.
I don't know what a 'mathematical' sentence is. I'd prefer to call it an English sentence that describes a mathematical process and makes a statement concerning mathematical matters.
... equals an even number