问题
解答题
怎样算简便就怎样算
715+265+335+285
125×32×5
7100-137-263+300
75×4×2×5.
答案
(1)715+265+335+285
=(715+285)+(265+335)
=1000+600
=1600;
(2)125×32×5
=125×8×4×5
=(125×8)×(4×5)
=1000×20
=20000;
(3)7100-137-263+300
=(7100+300)-(137+263)
=7400-400
=7000;
(4)75×4×2×5
=(75×4)×(2×5)
=300×10
=3000.