问题
解答题
脱式计算.
|
答案
(1)100-28+72,
=72+72,
=144;
(2)200-28×5,
=200-140,
=60;
(3)54+783÷27,
=54+29,
=83;
(4)40×(62-37),
=40×25,
=1000.
脱式计算.
|
(1)100-28+72,
=72+72,
=144;
(2)200-28×5,
=200-140,
=60;
(3)54+783÷27,
=54+29,
=83;
(4)40×(62-37),
=40×25,
=1000.