Toán Lớp 6: Câu 1 : (-7) . [ 8 – 3 . (14 : 7) – 12 : (-4)] – 3 . ( -2 )
Câu 2 : 4 . [(-2) . (8 : 4) + 15 : (-3) – (-12)]
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Toán Lớp 6: Câu 1 : (-7) . [ 8 – 3 . (14 : 7) – 12 : (-4)] – 3 . ( -2 )
Câu 2 : 4 . [(-2) . (8 : 4) + 15 : (-3) – (-12)]
Comments ( 2 )
Giải đáp:
$\text{Câu 1 : (-7) . [ 8 – 3 . (14 : 7) – 12 : (-4)] – 3 . ( -2 )}$
$\text{= (-7) . [ 8 – 3 . 2 – (-3) ] -3 . ( -2)}$
$\text{= (-7) . [ 8 – 6 + 3 ] – 3 . (-2)}$
$\text{= (-7) . [ 2 + 3] – 3 . (-2)}$
$\text{= (-7) . 5 – 3 . (-2)}$
$\text{= (-35) – (-6)}$
$\text{= -35 + 6}$
$\text{= -29 }$
$\text{Câu 2 : 4 . [(-2) . (8 : 4) + 15 : (-3) – (-12)]}$
$\text{= 4 . [(-2) . 2 + (-5) + 12]}$
$\text{= 4 . [ -4 + (-5) + 12] }$
$\text{= 4 . [ -9 + 12]}$
$\text{= 4. 3}$
$\text{= 12 }$
Nhớ đánh giá 5 sao và CTLHN nha
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