Multiplication, division, and more complex problem-solving strategies for third grade students.
After you solve a problem, look back and see if your answer makes sense. Estimating (making a smart guess) helps too! Round numbers to make quick checks and see if your answer is close to what you expected.
After finding \(7 \times 8 = 56\), check by adding 7 eight times.
Estimate \(23 \times 4\) by rounding 23 to 20, so \(20 \times 4 = 80\) as a quick check.