Think Mentals: 2 Answers

Estimate the answer: 400 ÷ 20 = 20 (so the answer should be around 18-20)

Visualize the numbers: Imagine a rectangle with sides 40 and 20, and add 3 and -3 to account for 43 and -7 to account for 17.

Calculate 43 × 17

Think Mental Math is a powerful approach to mental calculation that can help you solve mathematical problems quickly and accurately. By using visualization, estimation, and calculation, you can build your mental math skills and become more confident in your abilities. Practice with different problems and techniques, and you'll see improvement over time.

Perform the calculation: 432 ÷ 24 = 432 × (1/24) = 432 × (5/120) = 18 think mentals 2 answers

Perform the calculation: 43 × 17 = (40 + 3) × (20 - 3) = 40 × 20 - 40 × 3 + 3 × 20 - 3 × 3 = 800 - 120 + 60 - 9 = 731

Visualize the numbers: Imagine subtracting 24 repeatedly from 432. Estimate the answer: 400 ÷ 20 = 20

Verify your answer: Check that the answer is reasonable and accurate.

Calculate 432 ÷ 24