These: 1 x 300, 2 x 150, 3 x 100, 4 x 75, 5 x 60, 6 x 50, 10 x 30, 12 x 25, 15 x 20
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260
900
299 x 300 = 89700
300 x 300 equals 90,000. This is because when you multiply two numbers, you are essentially adding one number to itself as many times as the value of the other number. In this case, you are adding 300 to itself 300 times, which equals 90,000.
To mentally estimate the product of 313 and 489, you can round both numbers to the nearest hundred to simplify the calculation. 313 rounds to 300 and 489 rounds to 500. Multiply these rounded numbers together to get 300 x 500 = 150,000. This is a rough estimate of the product of 313 and 489.