早教吧作业答案频道 -->其他-->
怎样简便就怎样算780-456+2201456-56÷7×12325÷4÷25125×8883×26-15×83-83298×32299×31.
题目详情
怎样简便就怎样算
780-456+220 | 1456-56÷7×12 | 325÷4÷25 | 125×88 |
83×26-15×83-83 | 298×32 | 299×31. |
▼优质解答
答案和解析
(1)780-456+220
=780+220-456
=1000-456
=544;
(2)1456-56÷7×12
=1456-8×12
=1456-96
=1360;
(3)325÷4÷25
=325÷(4×25)
=325÷100
=3.25;
(4)83×26-15×83-83
=83×(26-15-1)
=83×10
=830;
(5)298×32
=(300-2)×32
=300×32-2×32
=9600-64
=9536;
(6)299×31
=(300-1)×31
=300×31-1×31
=9300-31
=9269.
=780+220-456
=1000-456
=544;
(2)1456-56÷7×12
=1456-8×12
=1456-96
=1360;
(3)325÷4÷25
=325÷(4×25)
=325÷100
=3.25;
(4)83×26-15×83-83
=83×(26-15-1)
=83×10
=830;
(5)298×32
=(300-2)×32
=300×32-2×32
=9600-64
=9536;
(6)299×31
=(300-1)×31
=300×31-1×31
=9300-31
=9269.
看了 怎样简便就怎样算780-45...的网友还看了以下:
求数列通项式a:1,2,5,6,3,4,8,7,9,10,14,13,11,12,16,15,b:4 2020-03-30 …
脱式计算(能简算的要简算)5.82-1.43-2.573.2×5.4+5.4×6.87.8+3.6 2020-04-07 …
计算下面各题,能简算的要简算:(1)7.29*4.6+46*2.71(2)2分之1÷3分之2*(8 2020-06-14 …
计算.6.9+4.8+3.10.456+6.22+3.7815.89+(6.75-5.89)4.0 2020-06-14 …
几条数学题,要简便,⑴8.8×6+3.4×8⑵1432×9090+1432×909⑶51×49+3 2020-06-14 …
某地随机检查了140名成年男性红细胞数(1012/L),数据的分布及频数如表:分组[3.8,4.0 2020-07-05 …
1.0.3:12=2.0.25:4=3.2.8:0.7=4.2.1:1.2=5.0.1:0.8=6 2020-07-17 …
6.8*8/25+0.32*4.2-8/25=一又1/4*17.6+36除以4/5+2.64*12 2020-07-19 …
四年级下期脱式计算题3.68+7.56-2.687.85+2.34-0.85+4.6635.6-1. 2020-11-06 …
直接写得数.1-0.99=3.6÷0.4=8.2+2.8=14×0.25×4=8.8+1.12=2. 2020-11-19 …