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

Toán Lớp 6: a) 98-8(x-2)=34 b) 2x:12=11 c) (x-2) : 12 = 11 d) (232-x) : 13 = 12 e) 1×2+2×3+3×4+4×5+-…+29×30 f) 1+ 2 + 3 +-+ 1000 g) 2 + 4 +

Home/ Toán Lớp 6: a) 98-8(x-2)=34 b) 2x:12=11 c) (x-2) : 12 = 11 d) (232-x) : 13 = 12 e) 1×2+2×3+3×4+4×5+-…+29×30 f) 1+ 2 + 3 +-+ 1000 g) 2 + 4 +

Toán Lớp 6: a) 98-8(x-2)=34 b) 2x:12=11 c) (x-2) : 12 = 11 d) (232-x) : 13 = 12 e) 1×2+2×3+3×4+4×5+-…+29×30 f) 1+ 2 + 3 +-+ 1000 g) 2 + 4 +

Tháng Chín 19, 2022 Toán học 1 Comment 0 views

Toán Lớp 6: a) 98-8(x-2)=34
b) 2x:12=11
c) (x-2) : 12 = 11
d) (232-x) : 13 = 12
e) 1×2+2×3+3×4+4×5+…….+29×30
f) 1+ 2 + 3 +….+ 1000
g) 2 + 4 + 6+…+128
giúp tui, giúp tui điii

Comments ( 1 )

  1. hienchaudiem
    hienchaudiem
    19 Tháng Chín, 2022 at 8:14 sáng
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
    a, 98 – 8.(x-2) = 34
    -> 8.(x-2)=98-34
    -> x-2=64:8
    ->x-2=8
    ->x=8+2
    ->x=10
    b, 2x : 12 = 11
    -> 2x = 11 . 12
    -> 2x = 132
    -> x=66
    c, (x-2) :12=11
    -> x-2=132
    ->x=134
    d, (232-x):12=11
    -> 232-x=132
    -> x=100
    e, 1.2 + 2.3 +……..+ 29.30
    -> 1/3 . ( 1.2.3 + 2.3.(4-1) +…..+ 29.30.(31-28) )
    -> 1/3 . ( 1.2.3 + 2.3.4 – 1.2.3 +…….+ 29.30.31 – 28.29.30 )
    -> 1/3 . 29.30.31
    -> 29.10.31
    -> 8990
    f, 1+2+3+…..+1000
    -> (1000+1) . [(1000-1):1+1] : 2
    -> 1001 . 500
    -> 500500
    g, 2+4+6+…….+128
    -> (168+2) . [(128-2):2+1] : 2
    -> 170 . 32
    -> 5440
    #Dung09

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

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