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

Toán Lớp 6: Bài 2 : Thực hiện phép tính b) 5[( 85 – 35 : 7 ) : 8 + 90 ] – 50

Toán Lớp 6: Bài 2 : Thực hiện phép tính
b) 5[( 85 – 35 : 7 ) : 8 + 90 ] – 50

Comments ( 2 )

  1. 5 [( 85 – 35 : 7 ) : 8 + 90 ] – 50
    = 5 [( 85 – 5 ) : 8 + 90 ] – 50
    = 5 [ 80 : 8 + 90 ] – 50
    = 5 [ 10 + 90 ] – 50
    = 5 . 100 – 50
    = 500 – 50
    = 450

  2. b)
    5[ ( 85 – 35 : 7 ) : 8 + 90 ] – 50
    = 5[ ( 85 -5 ) : 8 + 90 ] – 50
    = 5[ 80 : 8 + 90 ] – 50
    = 5[ 10 + 90 ] – 50
    = 5. 100 – 50
    = 500 – 50
    = 450

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