问题
解答题
脱式计算.
425-78×5
25×4×7
(35+55)×8.
答案
425-78×5
=425-390
=35;
25×4×7
=100×7
=700;
(35+55)×8
=90×8
=720.
脱式计算.
425-78×5
25×4×7
(35+55)×8.
425-78×5
=425-390
=35;
25×4×7
=100×7
=700;
(35+55)×8
=90×8
=720.