怎样简便就怎样计算 63+152+137+148= 102×99= 645-180-245= 382×101-382=

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  • ①63+152+137+148,

    =(63+137)+(148+152),

    =200+300,

    =500;

    ②102×99,

    =(100+2)×99,

    =9900+198,

    =10098;

    ③645-180-245,

    =(645-245)-180,

    =400-180,

    =220;

    ④382×101-382,

    =382×(101-1)

    =382×100,

    =38200;

    ⑤125×24,

    =(125×8)×3,

    =1000×3,

    =3000;

    ⑥35×8+35×6-4×35,

    =35×(8+6-4),

    =35×10,

    =350;

    ⑦1280÷16÷4,

    =1280÷(16×4),

    =1280÷64,

    =20;

    ⑧890-147-53,

    =890-(147+53),

    =890-200,

    =690;

    ⑨32×25×125,

    =(25×4)×(125×8),

    =100×1000,

    =100000.