问题
解答题
用简便方法计算
|
答案
1)8000÷125÷8,
=8000÷(125×8),
=8000÷1000,
=8;
(2)102×43,
=100×43+2×43,
=4300+86,
=4386;
(3)325+143+75+57,
=(325+75)+(143+57),
=400+200,
=600;
(4)278-79-21.
=278-(79+21),
=278-100,
=178.
用简便方法计算
|
1)8000÷125÷8,
=8000÷(125×8),
=8000÷1000,
=8;
(2)102×43,
=100×43+2×43,
=4300+86,
=4386;
(3)325+143+75+57,
=(325+75)+(143+57),
=400+200,
=600;
(4)278-79-21.
=278-(79+21),
=278-100,
=178.