Toán Lớp 6: -7 – x = -35
125*(-4)*5*25*(-2)*2^3*(-1)^1999
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Toán Lớp 6: -7 – x = -35
125*(-4)*5*25*(-2)*2^3*(-1)^1999
Comments ( 2 )
a)
-7 – x = -35
x = ( -7 ) – ( -35 )
x = 28
b)
125 . ( -4 ) . 5 . 25 . ( -2 ) . 2^3 . ( -1 )^1999
= 125 . ( -4 ) . 5 . 25 . ( -2 ) . 8 . ( -1 )
= ( 125 . 8 ) . [ ( -4 ) . 25 ] . [ ( -2 ) . 5 ] . ( -1 )
= 1000 . ( -100 ) . ( -10 ) . ( -1 )
= 1000 . [ ( -100 ) . ( -10 ) . ( -1 ) ]
= 1000 . ( -1000 )
= -1000000
#Huy
-7 – x = -35
x = -7 – ( -35 )
x = 28
——————
125. ( -4 ) × 5 × 25 × ( -2 ) × 2³ × $-1^{1999}$
= -500 × 5 × ( -50 ) × 8 × ( -1 )
= -4000 × 5 × 50
= -20 000 × 50
= -1 000 000
$\text{#lknhatminh0322}$