+42 -55
-13
To add +42 and -55, follow these steps:
Step 1: Write down the numbers vertically with the plus sign in front of the positive number and the minus sign in front of the negative number:
+42
-55
Step 2: Align the numbers vertically by place value (units, tens, hundreds, etc.):
+42
-55
Step 3: Start from the rightmost column (units column) and add the numbers:
+42
-55
-----
-13
Step 4: Write the result below the line:
+42
-55
-----
-13
So, +42 minus 55 equals -13.