Toán Lớp 6: B = 1 + ( – 4 ) + 2 + ( – 5 ) + …+ 20 + ( – 23 )
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Toán Lớp 6: B = 1 + ( – 4 ) + 2 + ( – 5 ) + …+ 20 + ( – 23 )
Comments ( 2 )
$\text{B = 1 + ( – 4 ) + 2 + ( – 5 ) + …+ 20 + ( – 23 )}$
$\text{B = -3 – 3 – … 3 }$$\text{B = – 3 $\times$ 4 }$
$\text{B = – 12 }$