问题
解答题
用简便方法计算.
|
答案
(1)4300÷4÷25
=4300÷(4×25)
=4300÷100
=43;
(2)1456-237-763
=1456-(237+763)
=1456-1000
=456;
(3)125×32×25
=125×8×4×25
=(125×8)×(4×25)
=1000×100
=100000;
(4)99×999
=99×(1000-1)
=99×1000-99×1
=99000-99
=98901;
(5)89×99+89
=89×(99+1)
=89×100
=8900;
(6)268-(168-35)
=268-168-35
=100-35
=65.