Estimation in Multiplication
Grade 4 · Math · Multi-Digit Multiplication · Nebraska, USA
Lesson Summary
Round numbers before multiplying to quickly estimate a product. Estimation helps you check whether your exact answer makes sense.
Explanation
Estimating means rounding each number to the nearest ten before you multiply. For 38 × 7, round 38 to 40 and multiply: 40 × 7 = 280. The exact answer is 266, so 280 is a close estimate. Estimation is useful when you want a quick answer or when you want to check your work. If your exact answer is far from your estimate, you probably made a mistake somewhere.
Practice Questions
Q1: Estimate 49 × 6 by rounding 49 to the nearest ten first.
Answer: 300 (50 × 6 = 300)
Q2: Estimate 32 × 8 by rounding 32 to the nearest ten first.
Answer: 240 (30 × 8 = 240)
Q3: Estimate 67 × 4 by rounding 67 to the nearest ten first.
Answer: 280 (70 × 4 = 280)
People Also Ask
What is Estimation in Multiplication in Grade 4 Math?+
Estimation in Multiplication is a lesson in the Multi-Digit Multiplication chapter of Grade 4 Math. It is part of the Nebraska, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Estimation in Multiplication?+
Estimation in Multiplication is taught in Grade 4 as part of the Math curriculum in Nebraska, USA.
How can I help my child with Multi-Digit Multiplication in Math?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Multi-Digit Multiplication topics.