简便计算(递等,每个步骤详细) 274+299+201+326 19.9×99+19.9

2025-04-07 12:20:44
推荐回答(4个)
回答1:

274+299+201+326
=(274+326)+(299+201)
=600+500
=1100;
19.9×99+19.9
=19.9×(99+1)
=19.9×100
=1990;
1.25×64×50
=1.25×8×8×50
=(1.25×8)×(50×8)
=10×400
=4000;
83×101
=83×(100+1)
=8300+83
=8383;
0.65×14+87×65%-20分之13
=0.65×14+0.65×87-0.65
=0.65×(14+87-1)
=0.65×100
=65;
9.25-3分之1+3.75-3分之8
=(9.25+3.75)-(1/3+8/3)
=13-3
=10;
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步

回答2:

第一题
274 + 299 + 201 + 326
= (274 + 326) + (299 + 201)
= 600 + 500
= 1100

第二题
19.9 X 99 + 19.9
= 19.9 X (99 + 1)
= 19.9 X 100
= 1990

第三题
1.25 X 64 X 50
= 1.25 X 32 X 100
= 125 X 8 X 4
= 4000

第四题
83 X 101
= 83 X 100 + 83
= 8300 + 83
= 8383

第五题
0.65 X 14 + 87 X 65% - 13/20
= 14 X 65/100 + 87 X 65/100 - 65/100
= 65/100 X (14 + 87 - 1)
= 65/100 X 100
= 65

第六题
9.25 - 1/3 + 3.75 - 8/3
= (9.25 + 3.75) - (1/3 + 8/3)
= 13 - 9/3
= 13 - 3
= 10

回答3:

1.274+326+(299+201)= 600+500=1100
2.19.9*(99+1)=1990
3.1.25*8*8*50=4000
4.83*100+83=8383
5.13/20=0.65.原式=0.65*(14+87-1)=65
6.9.25+3.75- (1/3+8/3)=10

回答4:

274+326+299+201=600+500=1100
19.9*(99+1)=1990
1*64*50+1/4*64*50=1*32*2*50+1/4*32*2*50=3200+800=4000
83*(100+1)=8300+83=8383
0.65*14+87*0.65-0.65=(14+87-1)*0.65=65
(9.25+3.75)-(1/3+8/3)=13-3=10