SME
Grade 7 Math
Operations with positive and negative rational numbers
The main lesson, then each kind of problem it solves.
Operations with positive and negative rational numbers
Main lesson
Adding with counters
Use this for “Show 3 + (−5) with counters.”
Subtracting signed numbers
Use this for “−3 − 8” and “How many feet higher is 1,640 ft than −212 ft?”
Multiplying and dividing signed numbers
Use this for “(−6)(−4)” and “54 ÷ (−9)”.
Fractions as decimals
Use this for “Write 3/8 as a decimal” or “Which decimal is closest to 13/16?”
The sign of the answer
Use this for “Is (−5) × (−7) positive or negative?” before working it out.