(1)346+18-180+20(2)125-46+75-54(3)2814÷7×10-1030(4)(647+31×7)÷3(5)240+5280÷(84-1
(1)346+18-180+20(2)125-46+75-54(3)2814÷7×10-1030(4)(647+31×7)÷3(5)240+5280÷(84-18)×30...
(1)346+18-180+20(2)125-46+75-54(3)2814÷7×10-1030(4)(647+31×7)÷3(5)240+5280÷(84-18)×30(6)2057÷[195-(226-98)÷16].
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(1)346+18-180+20,
=364-180+20,
=184+20,
=204;
(2)125-46+75-54,
=(125+75)-(46+54),
=200-100,
=100;
(3)2814÷7×10-1030,
=402×10-1030,
=4020-1030,
=2990;
(4)(647+31×7)÷3,
=(647+217)÷3,
=864÷3,
=288;
(5)240+5280÷(84-18)×30,
=240+5280÷66×30,
=240+80×30,
=240+2400,
=2640;
(6)2057÷[195-(226-98)÷16],
=2057÷[195-128÷16],
=2057÷[195-8],
=2057÷187,
=11.
=364-180+20,
=184+20,
=204;
(2)125-46+75-54,
=(125+75)-(46+54),
=200-100,
=100;
(3)2814÷7×10-1030,
=402×10-1030,
=4020-1030,
=2990;
(4)(647+31×7)÷3,
=(647+217)÷3,
=864÷3,
=288;
(5)240+5280÷(84-18)×30,
=240+5280÷66×30,
=240+80×30,
=240+2400,
=2640;
(6)2057÷[195-(226-98)÷16],
=2057÷[195-128÷16],
=2057÷[195-8],
=2057÷187,
=11.
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