问题
解答题
|
答案
(1)44×25
=11×(4×25),
=11×100,
=1100;
(2)204×15
=(200+4)×15,
=200×15+4×15,
=3000+60,
=3060;
(3)365-73-27
=365-(73+27),
=365-100,
=265;
(4)(25.8+7.5)+2.5
=25.8+(7.5+2.5),
=25.8+10,
=35.8.
|
(1)44×25
=11×(4×25),
=11×100,
=1100;
(2)204×15
=(200+4)×15,
=200×15+4×15,
=3000+60,
=3060;
(3)365-73-27
=365-(73+27),
=365-100,
=265;
(4)(25.8+7.5)+2.5
=25.8+(7.5+2.5),
=25.8+10,
=35.8.