3. Use distributive law to evaluate :
(i) 984 x 102
(ii) 385 x 1004
(iii) 446 x 10002
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Gudnyt
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1)
984 * 102
= (1000 - 16) (100 + 2)
= 1000*100 + 1000*2 - 16*100 - 16*2
= 100000 + 2000 - 1600 - 32
= 102000 - 1632
= 100368
2)
385 * 1004
= (400 - 15)(1000 + 4)
= 400*1000 + 400*4 - 15*1000 - 15*4
= 400000 + 1600 - 15000 - 60
= 401600 - 15060
= 386540
3)
446 * 10002
= (450 - 4)(10000 + 2)
= 450*10000 + 450*2 - 4*10000 - 4*2
= 4500000 + 900 - 40000 - 8
= 4500900 - 40008
= 4460892
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