Estimate the following products using general rule Class 6

Question – Estimate the following products using general rule Class 6:
(a) 578 × 161
(b) 5281 × 3491
(c) 1291 × 592
(d) 9250 × 29

Solution –

(a) By rounding off each factor to its greatest place

578 rounds off to 600 as 578 is closer to 600 than 500

161 rounds off to 200 as 161 is closer to 200 than 100.

Estimated product = 600 x 200 = 1,20,000

(b) By rounding off each factor to its greatest place

5,281 rounds off to 5,000
3,491 rounds off to = 3,500
Estimated product = 5,000 x 3,500 = 1,75,00,000

(c) By rounding off each factor to its greatest place

1,291 rounds off to = 1,300
592 rounds off to = 600
Estimated product = 1,300 x 600 = 7,80,000

(d) By rounding off each factor to its greatest place

9,250 rounds off to = 10,000
29 rounds off to = 30
Estimated product = 10,000 x 30 = 3,00,000

Related Questions –

• Estimate each of the following using general rule Class 6
• Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens)