The answer would be an overestimate.
when both factors in a multiplication problem are rounded up to estimate the product, the estimate is an overestimate.
You would call that an estimate, or overestimate.
If you rounded up, it's an overestimate, if you rounded down, it's an underestimate. If you did both, whatever you did more of will prevail.
Multiplication and DivisionRound the answer to the same number of significant figures (sig figs) as the measurement with the fewest sig figs in the problem.34.9cm x 4.7cm = 164.03cm2 = 160cm2 (rounded to two sig figs)271.0g/99.8cm3 = 2.71543g/cm3 = 2.715 (rounded to four sig figs)Addition and SubtractionRound the answer to the fewest decimal places as the measurement with the fewest decimal places.9.45kg + 8.329kg = 17.78kg (rounded to two decimal places)
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.
when both factors in a multiplication problem are rounded up to estimate the product, the estimate is an overestimate.
That's an overestimate.
overestimate
You would call that an estimate, or overestimate.
Assuming that the estimate is based on sensible approximations, there is no simple way. You will need to compare the estimate and the true value. If you've rounded up, the estimate will be greater. If you've rounded down, the estimate will be less.
Overestimation, perhaps.
It's not actually a product. "Product" is the result of multiplication only.(20)20 = 104,857,600,000,000,000,000,000,000 (exact; not rounded)
If you have rounded up, it will be an overestimate. If you have rounded down, it will be an underestimate.
If you rounded up, it's an overestimate, if you rounded down, it's an underestimate. If you did both, whatever you did more of will prevail.
To round to estimate the product of 38 x 2, you first round each number to a more manageable value. In this case, you can round 38 to 40 and 2 to 0. Then, multiply the rounded numbers together to get an estimate of the product. In this case, 40 x 0 = 0. So, the estimated product of 38 x 2 is 0.
765 can be rounded to 800, and 433 to 400. 800 x 400 = 320,000
Multiplication and DivisionRound the answer to the same number of significant figures (sig figs) as the measurement with the fewest sig figs in the problem.34.9cm x 4.7cm = 164.03cm2 = 160cm2 (rounded to two sig figs)271.0g/99.8cm3 = 2.71543g/cm3 = 2.715 (rounded to four sig figs)Addition and SubtractionRound the answer to the fewest decimal places as the measurement with the fewest decimal places.9.45kg + 8.329kg = 17.78kg (rounded to two decimal places)