(2012•宝应县模拟) 脱式计算

1个回答

  • (1)2500+450÷18×32,

    =2500+25×32,

    =2500+25×4×8,

    =2500+100×8,

    =2500+800,

    =3300;

    (2)26×[24/25],

    =(25+1)×[24/25],

    =25×[24/25]+1×[24/25],

    =24+[24/25],

    =24[24/25];

    (3)47×([1/23]+[2/47])×23,

    =(47×23)×([1/23]+[2/47]),

    =47×23×[1/23]+47×23×[2/47],

    =47+46,

    =93.