A-A+
计算:(1)2-613÷926-23+1835÷0.6×23(2)[213+(5.4-223
问题详情
计算:
(1)2-
(2)[2
(3)62.5%×(1
(4)51
参考答案
(1)2-613÷926-23+1835÷0.6×23,
=2-613×269-23+1835×53×23,
=2-43-23+47,
=2-(43+23)+47,
=2-2+47,
=47;
(2)[213+(5.4-223)×123]÷689,
=[213+275×53-83×53]÷689,
=[73+9-409]÷689,
=629×962,
=1;
(3)62.5%×(123+316)+16÷1.6-58,
=62.5%×(123+316)+16÷1.6-58,
=58×296+16×58-58,
=(296+16-1)×58,
=4×58,
=52;
(4)5123×35+7134×47+9145×59,
=(50+53)×35+(70+74)×47+(90+95)×59,
=50×35+53×35+70×47+74×47+90×59+95×59,
═30+1+40+1+50+1,
=123.
考点: