Explore the foundational concepts of mathematics through engaging activities and problem-solving strategies designed for 3rd graders.
Always look back at your work to catch mistakes. Try estimating your answer first by rounding numbers, then see if your real answer is close. Estimation helps you know if your answer makes sense. Checking keeps you confident and accurate!
Estimate 397 + 222 by rounding to 400 + 200 = 600.
After solving 45 ÷ 5 = 9, multiply 9 × 5 to check.