4. Estimate using general rule:
(a) 3,452 + 6,123
(b) 456 x 23,989
Answers
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Step-by-step explanation:
(a)round off nearest thousand
3452 = 3000
6123 = 6000
their sum = 3000+ 6000
= 9000
(b) round off nearest hundred
456 = 500
23989 = 24000
= 500 × 24000
= 12000000
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