使用简便方法计算.169+38+131 &nbs...

使用简便方法计算.169+38+131 25×24 359-36-64 78×4×5.
2025-04-13 17:20:04
推荐回答(1个)
回答1:

①169+38+131
=169+131+38
=300+38
=338;

②25×24
=25×(4×6)
=(25×4)×6
=100×6
=600;

③359-36-64
=359-(36+64)
=359-100
=259;

④78×4×5
=78×(4×5)
=78×20
=1560.