1.Estimate each of the following using general rule: (a) 730+990 (b) 796-314 (c) 12,904+2,888 (d) 28,292-21,496   2. Give a rough estimate ( by rounding off nearest hundreds ) and also a closer estimate ( by rounding off to nearest tense): (a) 439+334+4,317 (b) 1,08,734-47,599 (c) 8325-491 (d) 4,89,348-48,365      3. Estimate the following products using general rule : (a) 578 multiply 161 (b) 5281 multiply 3491 (c) 1291 multiply 529 (d) 9250 multiply 29

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