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100+100-100+1000-1000+10000-10000+69
=100+100-100+1000-1000+10000-10000+69
=100+69
=169
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bằng 300 nha
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100 x 100 + ( 100 + 100 x 2 )
10000 + (100+200)
10000+300
=10300
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a) 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 + 50 = 50 x 12
= 600
b) 100 + 100 + 100 + 100 + 100 + 100 + 100 + 100 + 100 = 100 x 9
900
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= 100010300 nhé
1000010300