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

Toán Lớp 6: 1. tìm x a) 623+ (27-x) – (46+2x ) = 867- (437-60) b) 48- (4x – 5) – (13-3x)= 137 – (12 – 27) 2. tính nhanh a) 942 – 2563 + 2563 – 1942

Home/ Toán Lớp 6: 1. tìm x a) 623+ (27-x) – (46+2x ) = 867- (437-60) b) 48- (4x – 5) – (13-3x)= 137 – (12 – 27) 2. tính nhanh a) 942 – 2563 + 2563 – 1942

Toán Lớp 6: 1. tìm x a) 623+ (27-x) – (46+2x ) = 867- (437-60) b) 48- (4x – 5) – (13-3x)= 137 – (12 – 27) 2. tính nhanh a) 942 – 2563 + 2563 – 1942

Tháng Chín 24, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: 1. tìm x
a) 623+ (27-x) – (46+2x ) = 867- (437-60)
b) 48- (4x – 5) – (13-3x)= 137 – (12 – 27)
2. tính nhanh
a) 942 – 2563 + 2563 – 1942
b)13 – 12 +11+ 10 – 9 +8 – 7 – 6 + 5 – 4 + 3 + 2 -1
Giúp mình với, mình đag cần gấp, pleaseeeeee!

Comments ( 2 )

  1. haianhtu97
    haianhtu97
    24 Tháng Chín, 2022 at 2:38 sáng
    Reply
    a,
    623+(27-x)-(46+2x)=867-(437-60)
    ->623+27-x-46-2x=867-377
    ->623+27-46-x-2x=490
    ->604-3x=490
    ->3x=604-490
    ->3x=114
    ->x=114:3
    ->x=38
    $\\$
    b,
    48-(4x-5)-(13-3x)=137-(12-27)
    ->48-4x+5-13+3x=137-(-15)
    ->48+5-13-4x+3x=137+15
    ->40-x=152
    ->x=40-152
    ->x=-112
    Vậy x=-112
    ————————
    $\\$
    a,
    942-2563+2563-1942
    =(942-1942)+(2563-2563)
    =-1000+0
    =-1000
    $\\$
    b,
    13-12+11+10-9+8-7-6+5-4+3+2-1
    =13-(12-11-10+9)+(8-7-6+5)-(4-3-2+1)
    =13-0+0-0
    =13
     

  2. lanhuongthu
    lanhuongthu
    24 Tháng Chín, 2022 at 2:37 sáng
    Reply
    b1
    a) 623+ (27-x) – (46+2x ) = 867- (437-60)
    623+27-x-46-2x=867-377
    604-3x=490
    604-490=3x
    114=3x
    ⇒x=114/3=38
     
    b)48- (4x – 5) – (13-3x)= 137 – (12 – 27)
    48-4x+5-13+3x=137+15
    40-x=152
    ⇒x=40-152
    ⇒x=-112
    b2
    a)942 – 2563 + 2563 – 1942
    =942-1942
    =-1000
    b)13 – 12 +11+ 10 – 9 +8 – 7 – 6 + 5 – 4 + 3 + 2 -1
    =13 – (12 -11-10+9)+ (8-7 – 6 +5 )- (4 – 3 – 2 +1)
    =13-0-0-0
    =13

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

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