Lesson 1.4: Plus and Minus Signs
The symbol for addition is the plus sign, dots three four six. The symbol for subtraction is the minus sign, dots three six.Guidelines for use of the plus and minus symbols
When used to indicate addition or subtraction, there is no space between the numerals or other symbols and the signs of operation. The numeric indicator is not used after the sign of operation.
twelve plus seven
fifteen minus six
sixteen plus seven minus four
twenty two minus five minus three