问题
解答题
脱式计算我最棒.
2400-36×45
(338+412)+25
400×(225-199)÷25.
答案
(1)2400-36×45,
=2400-1620,
=780;
(2)(338+412)+25,
=750+25,
=775;
(3)400×(225-199)÷25,
=400×26÷25,
=10400÷25,
=416.
脱式计算我最棒.
2400-36×45
(338+412)+25
400×(225-199)÷25.
(1)2400-36×45,
=2400-1620,
=780;
(2)(338+412)+25,
=750+25,
=775;
(3)400×(225-199)÷25,
=400×26÷25,
=10400÷25,
=416.