A-A+
脱式计算 其中①-③小题要简算.①2417-524-1924②38×25+35÷8×3③40
问题详情
①
参考答案
(1)2417-524-1924,
=2417-(524+1924),
=2417-1,
=717;
(2)38×25+35÷8×3,
=38×(25+35),
=38×1,
=38;
(3)40×(2-58-25-34),
=40×2-40×58-40×25-40×34,
=80-25-16-30,
=55-16-30,
=39-30,
=9;
(4)(76-59)÷118,
=1118÷118,
=49;
(5)89÷[(25+110)×43],
=89÷[12×43],
=89÷23,
=113;
(6)[56-(512+38)]÷34,
=[56-124]÷34,
=1924÷34,
=1118.
考点: