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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Tính hợp lý ( nếu có thể ) : a, 48 . (-21) + 142 . (-24) b, 2^4 . 5 – [ 131 – (13 – 4)^2] c, 100 : {250 :[450 – (4 . 5^3 – 2^2 . 25)]}

Tháng Mười Hai 12, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: Tính hợp lý ( nếu có thể ) :
a, 48 . (-21) + 142 . (-24)
b, 2^4 . 5 – [ 131 – (13 – 4)^2]
c, 100 : {250 :[450 – (4 . 5^3 – 2^2 . 25)]}
i, -4 . 35 . (-25)

Comments ( 2 )

  1. truonganhthi
    truonganhthi
    12 Tháng Mười Hai, 2022 at 11:45 chiều
    Reply
    Giải đáp+Lời giải và giải thích chi tiết:
    $\text{a) 48 . ( -21 ) + 142 . ( -24 )}$
    $\text{= ( -1008 ) + ( -3408 ) }$
    $\text{= -4416}$
    $\text{b) $2^{4}$ . 5 – [ 131 – (13 – 4)² }$
    $\text{= 16 . 5 – ( 131 – ( 9² ) )}$
    $\text{= 80 -50 }$
    $\text{= 30 }$
    $\text{c) 100 : { 250 : [ 450 – ( 4 . 5³ – 2² . 25)]} }$
    $\text{= 100 : { 250 : [ 450 – ( 4 . 125 – 4 . 25 )]} }$
    $\text{= 100 : { 250 : [ 450 – 4 ( 125 – 25 ) ]} }$
    $\text{= 100 : { 250 : [ 450 – 4 . 100 ]} }$
    $\text{= 100 : [ 450 – 400 ]} }$
    $\text{= 100 : 50 }$
    $\text{= 20 }$
    $\text{i) ( -4 ) . 35 . ( -25 )}$
    $\text{= [ ( -4 ) . ( -25 )] . 35 }$
    $\text{= 100 . 35}$
    $\text{= 3500}$
    $#Shi$
    $\text{Xin ctlhn ạ}$

  2. tonhu12
    tonhu12
    12 Tháng Mười Hai, 2022 at 11:44 chiều
    Reply
    $\text{a) 48 . (-21) + 142 . (-24)}$
    $\text{= 24 . 2 . (-21) + (-142) . 24}$
    $\text{= 24 . (-42) + (-142) . 24}$
    $\text{= 24 . [(-42) + (-142)]}$
    $\text{= 24 . (-42 – 142)}$
    $\text{= 24 . (-184)}$
    $\text{= -4416}$
    $\text{b) $2^{4}$ . 5 – [131 – (13 – 4)²]}$
    $\text{= 16 . 5 – [131 – (9)²]}$
    $\text{= 80 – (131 – 81)}$
    $\text{= 80 – 50}$
    $\text{= 30}$
    $\text{c) 100 : {250 : [450 – (4 . $5^{3}$ – $2^{2}$ . 25)]}}$
    $\text{= 100 : {250 : [450 – (4 . 125- 4 . 25)]}}$
    $\text{= 100 : {250 : [450 – 4 . (125 – 25)]}}$
    $\text{= 100 : [250 : (450 – 4 . 100)]}$
    $\text{= 100 : [250 : (450 – 400)]}$
    $\text{= 100 : (250 : 50)}$
    $\text{= 100 : 5}$
    $\text{= 20}$
    $\text{i) -4 . 35 . (-25)}$
    $\text{= [(-4) . (-25)] . 35}$
    $\text{= 100 . 35}$
    $\text{= 3500}$
    $\textit{Ha1zzz}$
     

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222-9+11+12:2*14+14 = ? ( )

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