i have to estimate each product or quotient are these right?

-72 x 57 i got:
-70 x 60 - -4200

-92 x (-41) i got
3600

-83 x 52 i got:
-80 x 50 = -40000

-803 x (-106) i got
-800 x (-100) = 80000

49 x 61 i got 50 x 60 = 3000

i don't know about these division ones
-476 / 90
-500/ 90 ?

538 / (-63)
500 / 60 ?

479 / (-61)
500 / (-60)?

I agree with your estimates.

For this one, I'd find a multiple of 90

476 = 450
450/90 = 50

Do the same for the others.

SO IT WOULD BE -476 / 90

ESTIMATE IS -450 / 90 IS -5

IM NOT UNDERSTANDING ESTIMATE FOR
538/ (-63)

479 / (-61)

Multiples of 60: 60, 120, 180, 240, 300, 360, 420, 480, 540

Which is closest to 476?

closest to 476 is 480

Right.

480/60 = ?

To estimate each product or quotient, you can round the numbers to the nearest ten or hundred and perform the calculations mentally. Here's how you can estimate each one:

1. -72 x 57:
Estimate -72 to -70 and round 57 to 60:
-70 x 60 = -4200

2. -92 x (-41):
Estimate -92 to -90 and -41 to -40:
-90 x -40 = 3600

3. -83 x 52:
Estimate -83 to -80 and round 52 to 50:
-80 x 50 = -4000

4. -803 x (-106):
Estimate -803 to -800 and -106 to -100:
-800 x -100 = 80000

5. 49 x 61:
Estimate 49 to 50 and 61 to 60:
50 x 60 = 3000

For the division problems, estimation can be done slightly differently. Instead of rounding, we can find numbers that are close to the dividend and the divisor, making the division simpler:

1. -476 / 90:
Find numbers that are close to -476 and 90, for example, -480 and 100:
-480 / 100 = -4.8

2. -500 / 90:
Find numbers that are close to -500 and 90, for example, -490 and 100:
-490 / 100 = -4.9

3. 538 / (-63):
Find numbers that are close to 538 and -63, for example, 540 and -60:
540 / -60 = -9

4. 500 / 60:
Find numbers that are close to 500 and 60, for example, 480 and 70:
480 / 70 = 6.857 (approximately)

5. 479 / (-61):
Find numbers that are close to 479 and -61, for example, 480 and -60:
480 / -60 = -8

6. 500 / (-60):
Find numbers that are close to 500 and -60, for example, 480 and -70:
480 / -70 = -6.857 (approximately)

These estimations should give you a rough idea of the products and quotients.