When multiplying two numbers that end in zeros, you can multiply the non-zero digits first and then add all the zeros at the end to get the final product. For example, 100 × 200 = 20,000 (1×2=2, then add 4 zeros), 200 × 300 = 60,000 (2×3=6, then add 4 zeros), and 400 × 500 = 200,000 (4×5=20, then add 4 zeros).
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Numberblocks - Multiplication of TWO HUGE Numbers | Learn to Count | Learning MATH | MathPlayID
Added:Let's multiply two huge numbers together and see what happens.
100 * 200 >> [music] >> = 2 20,000 200 * 300 >> [music] >> = 2 60,000 [music] 300 * 300 = 2 90,000 200 * 400 >> [music] >> = 2 80,000 >> [music] >> 400 * 500 >> [music] >> = 2 200,000 How about it?
Can you guess all the numbers correctly?
You see, multiplying huge numbers with zeros behind them is the same as multiplying small numbers, then add all the zeros at the end.
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