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  • Estimate each of the following using general rule

1. Estimate each of the following using general rule:
(a) 730 + 998      (b) 796 – 314       (c) 12,904 +2,888       (d) 28,292 – 21,496

Answers (1)

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(a) 730 + 998     
By rounding off to hundreds,

730 rounds off to 700,

998 rounds off to 1000.

Required sum = 700+1000

= 1700

 

(b) 796-314

By rounding off to hundreds,

796 rounds off to 800,

314 rounds off to 300.

Required difference = 800-300

= 500

 

(c) 12904+2822

By rounding off to thousands,

2904 rounds off to 13000,

2822 rounds off to 3000.

Required sum = 13000+3000

= 16000

 

(d) 28,296 - 21, 496

By rounding off to nearest thousands,

28,296 rounds off to 28000,

21,496 rounds off to 21,000

Required difference = 28,000 - 21,000

= 7,000

Posted by

HARSH KANKARIA

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