Answers to mental math problems

From KNILT
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
  • Let's use some mental math! Solve the following problems using mental math...
    • 1. -8 + -9= -17
    • 2. -15 + -6= -21
    • 3. 50 + 36= 86
    • 4. -200 + -50= -250

Back to adding integers with the same sign using models