合理,灵活的计算下面各题 25×44 10-(4+0.05) 2.32-1.5+3.68-2.5 420+28 (4800÷75+36

2024-11-17 21:27:01
推荐回答(1个)
回答1:

(1)25×44,
=25×4×11,
=100×11,
=1100;

(2)10-(4+0.05),
=10-4.05,
=5.95;

(3)2.32-1.5+3.68-2.5,
=(2.32+3.68)-(1.5+2.5),
=6-4,
=2;

(4)420+28=448;

(5)(4800÷75+36)×12,
=(64+36)×12,
=100×12,
=1200;

(6)(2007+2007+2007+2007)×25,
=(2007×4)×25,
=2007×(4×25),
=2007×100,
=200700.