计算下面各题:(能简算的要简算)

1个回答

  • (1)6.7+25+3.3+75

    =(6.7+3.3)+(25+75),

    =10+100,

    =110;

    (2)103×12

    =(100+3)×12,

    =100×12+3×12,

    =1200+36,

    =1236;

    (3)14.85-(4.85+2.5)

    =14.85-4.85-2.5,

    =10-2.5,

    =7.5;

    (4)15×99+15

    =(99+1)×15,

    =100×15,

    =1500;

    (5)9.14-1.43-4.57

    =9.14-(1.43+4.57),

    =9.14-6,

    =3.14;

    (6)2000÷125÷8

    =2000÷(125×8),

    =2000÷1000,

    =2.