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

Toán Lớp 6: Giup mk nha : Giải nhanh : a) 13.58.4 32.26.2 52.10 c) 14.35.5 10.25.7 20.70 b) 15.37.4 120.21 21.5.12 d) 25.4 10.2.25 6.50

Toán Lớp 6: Giup mk nha :
Giải nhanh :
a) 13.58.4 32.26.2 52.10 c) 14.35.5 10.25.7 20.70 b) 15.37.4 120.21 21.5.12 d) 25.4 10.2.25 6.50

Comments ( 1 )

  1. Giải đáp:
    a/ 13.58.4+32.26.2+52.10
    = 52.58+32.52+52.10
    =52(58+32+10)
    = 52.100
    =5200
    b/ 15.37.4+120.21+21.5.12
    = 60.37+60.2.21+60.21
    = 60(37+2.21+21)
    = 60.100
    = 6000
    c/ 14.35.5+10.25.7+20.70
    = 70.35+70.25+20.70
    = 70(35+25+20)
    = 70.80
    = 5600
    d/ 25.4+10.2.25+6.50
    = 100 + 100.5+100.3
    =100(1+5+3)
    =100.9
    =900
     

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

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