问题
解答题
脱式计算.
7×(625-387)
200-40×3
405×3-600.
答案
(1)7×(625-387)
=7×238
=1666;
(2)200-40×3
=200-120
=80;
(3)405×3-600
=1215-600
=615.
脱式计算.
7×(625-387)
200-40×3
405×3-600.
(1)7×(625-387)
=7×238
=1666;
(2)200-40×3
=200-120
=80;
(3)405×3-600
=1215-600
=615.