计算下面各题,能用简便方法计算: 1.29+3.7+0.71+6.3 528×78+472×78 99×45+45 456-189-11
计算下面各题,能用简便方法计算:1.29+3.7+0.71+6.3528×78+472×7899×45+45456-189-1119×96-962÷74(520+480)...
计算下面各题,能用简便方法计算: 1.29+3.7+0.71+6.3 528×78+472×78 99×45+45 456-189-11 19×96-962÷74 (520+480)÷50×4 400-(1300÷65+35) 86.7-(14.3-3.8 )
展开
1个回答
展开全部
(1)1.29+3.7+0.71+6.3,
=(1.29+0.71)+(3.7+6.3),
=2+10,
=12;
(2)528×78+472×78,
=(528+472)×78,
=1000×78,
=78000;
(3)99×45+45,
=(99+1)×45,
=100×45,
=4500;
(4)456-189-11,
=456-(189+11),
=456-200,
=256;
(5)19×96-962÷74,
=1824-13,
=1811;
(6)(520+480)÷50×4,
=1000÷50×4,
=20×4,
=80;
(7)400-(1300÷65+35),
=400-(20+35),
=400-55,
=345;
(8)86.7-(14.3-3.8 ),
=86.7-10.5,
=76.2.
=(1.29+0.71)+(3.7+6.3),
=2+10,
=12;
(2)528×78+472×78,
=(528+472)×78,
=1000×78,
=78000;
(3)99×45+45,
=(99+1)×45,
=100×45,
=4500;
(4)456-189-11,
=456-(189+11),
=456-200,
=256;
(5)19×96-962÷74,
=1824-13,
=1811;
(6)(520+480)÷50×4,
=1000÷50×4,
=20×4,
=80;
(7)400-(1300÷65+35),
=400-(20+35),
=400-55,
=345;
(8)86.7-(14.3-3.8 ),
=86.7-10.5,
=76.2.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询