Explain how using basic facts can help you find the product of [tex]10 \times 20 \times 30 \times 40[/tex] mentally.

Hi Softballgirl6! I would say that first, we could pretend that the zeros don't exist because we could add those in later. Then just working with 1x2x3x4, we could mentally solve this to 24 and then add in the extra 4 zeros that we left out at the beginning. This brings the answer to 240000. Hope this helps! :)

Answered by djpatel1 | 2024-06-10

1 2 3 4 10000 6 4 10000 24*10000 240000

Answered by thekid100000 | 2024-06-10

To calculate 10 × 20 × 30 × 40 , multiply the core numbers first: 1 × 2 × 3 × 4 = 24 , then add the zeros from the original numbers for the final answer of 240000 . This makes mental calculation simpler and faster.
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Answered by djpatel1 | 2025-03-22