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2 months ago

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What is the best estimate for the product of 289 and 7

2 answers:

Inessa [12.5K]2 months ago

7 0

Estimate: 289 × 7 ≈ 3000

Additional details

Using rounding with whole numbers helps produce quick estimates for computations. Such approximations act as checks to determine whether a calculated result is reasonable.

When rounding to the nearest hundred, examine the tens digit.

1. If the tens digit is 1–4, drop the tens and ones (round down).

Example: 735 → 700

2. If the tens digit is 5–9, increase the hundreds place by one (round up).

Example: 279 → 300

For estimating 289 × 7, apply rounding like this:

1. Round 7 up to 10 because it is greater than 5.

2. Round 289 to 300 since the tens digit is 8.

Thus the estimated multiplication is:

10 x 300 = 3000

Further reading

Round 4,398,202 to the nearest 100

brainly.com/question/640968

Rounding the constants and coefficients in the equation

brainly.com/question/199538

Round each of the factors to the nearest ten

brainly.com/question/11239547

Round all-the-way 2,689

brainly.com/question/271759

Tags: integer, multiplication, rounded up

Zina [12.3K]2 months ago

3 0

Answer: The approximate value of 289 multiplied by 7 is 2,900.

Explanation, step by step:

Estimating strategy:

Because one factor is a single-digit number (7), round the other factor to the nearest one to form the estimate.

Round to the nearest one:

Therefore,

$289\text{ changes to }290\\\\7\text{ changes to }10\\$

Consequently,

Calculated product:

$290\times 10\\\\=2900$

That is the nearest-one estimate for 289 × 7.

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