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

Toán Lớp 6: 1.Tính a,12.35 + 12.65 b,50 – [ (50- 2 mũ 3 .5): 2 +3 ] c,25.78 + 22.25 – 2500

Toán Lớp 6: 1.Tính
a,12.35 + 12.65
b,50 – [ (50- 2 mũ 3 .5): 2 +3 ]
c,25.78 + 22.25 – 2500

Comments ( 2 )

  1. a,12.35 + 12.65
    =12.(35+65)
    =12.100
    =1200
    b,50-[(50-2³.5):2+3]
    =50-[(50-8.5):2+3]
    =50-[(50-40):2+3]
    =50-[10:2+3]
    =50-[5+3]
    =50-8
    =42
    c,25.78 + 22.25 – 2500
    =1950+550-2500
    =2500-2500
    =0

  2. a, 12.35+12.65
    = 12.(35+65)
    = 12.100
    = 1200
    b,50 – [ (50- 2^3 .5): 2 +3 ]
    = 50 – [ (50- 8 .5): 2 +3 ]
    = 50 – [ (50-40): 2 +3 ]
    = 50 – [ 10: 2 +3 ]
    = 50 – [5 +3 ]
    = 50 – 8
    = 42
    c, 25.78 + 22.25 – 2500
    = 25.(78+22)-2500
    = 25.100-2500
    = 0

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

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