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用简便方法计算<1.>1.25*4*2.5.0.8<2.>9.06*9+9.06<3>25*1.6<4>8.98*101<5.>1.25*&

答案:4  悬赏:10  手机版
解决时间 2021-03-01 06:59
  • 提问者网友:你独家记忆
  • 2021-02-28 16:47
<6>. 3.69+3.69*99 <7>4.52*9.9+0.452 <8> 0.125*32*32*0.25 <9> 19.8*4-9.8*4 <10> <8-0.8>*1.25 <11> 0.25*1.5*40 <12> 3.6*5.8-36*0.08
最佳答案
  • 五星知识达人网友:躲不过心动
  • 2020-06-02 16:07
1.25×4×2.5×0.8
=(1.25×0.8)×(4×2.5)
=1×10
=10

9.06×9+9.06
=9.06×(9+1)
=9.06×10
=90.6

25×1.6
=(25×4)×0.4
=100×0.4
=40

8.98×101
=8.98×(100+1)
=8.98×100+8.98
=898+8.98
=906.98

1.25×(0.8+0.4)
=1.25×0.8+1.25+0.4
=1+0.5
=1.5

3.69+3.69*99
=3.69×(1+99)
=3.69×100
=369

4.52*9.9+0.452
=4.52×9.9+4.52×0.1……………变一变就简便
=4.52×(9.9+0.1)
=4.52×10
=45.2

0.125*32*32*0.25 ……………变一变就简便
=(0.125×8)×32×(4×0.25)
=1×32×1
=32

19.8*4-9.8*4
=4×(19.8-9.8)
=4×10
=40

<8-0.8>*1.25
=8.8×1.25
=1.1×(8×1.25)
=1.1×10
=11

0.25*1.5*40
=(0.25×40)×1.5
=10×1.5
=15

3.6*5.8-36*0.08
=3.6×5.8-3.6×0.8
=3.6×(5.8-0.8)
=3.6×5
=18
全部回答
  • 1楼网友:你哪知我潦倒为你
  • 2020-03-06 06:26
2.5.0.8…………什么意思? (2) 9.06*9+9.06 =9.06*9+9.06*1=9.06*(9+1)=9.06*10=90.6 (3)25*1.6 =25*4*0.4=100*0.4=40 <4> 8.98*101 =8.98*(100+1)=8.98*100+8.98*1=898+8.98=906.98 < 5.> 1.25*<0.8+0.4>=1.25*0.8+1.25*0.4=1+0.5=1.5 打的好累,其他也就这么做吧!
  • 2楼网友:舊物识亽
  • 2019-12-03 21:27
<1.> 1.25*4*2.5.0.8看不懂,没写清楚,暂时不回答 <2.> 9.06*9+9.06 =9,06x(9+1)=90.6 <3> 25*1.6=25x4x0.4=40 <4> 8.98*101 =8.98x(100+1)=898+8.98=906.98 < 5.> 1.25*<0.8+0.4>=0.125x8+0.125x4=1.5 <6>. 3.69+3.69*99 =3.69x(99+1)=369 <7>4.52*9.9+0.452 =0.452x99+0.452=0.452x(99+1)=45.2 <8> 0.125*32*32*0.25=0.125x8x4x4x8x0.25=1x4x8x1=32 <9> 19.8*4-9.8*4=(19.8-9.8)x4=40 <10> <8-0.8>*1.25 =8x1.25-0.8x1.25=10-1=9 <11> 0.25*1.5*40 =0.25x40x1.5=10x1.5=15 <12> 3.6*5.8-36*0.08=36x0.58-36x0.08=36x0.5=18
  • 3楼网友:渊鱼
  • 2020-11-07 04:44
(1) 1.25×4×2.5×0.8 (2)9.06×9+9.06 (3)25×1.6 =(1.25×0.8)×(2.5×4) =(9 +1)×9.06 =(25×4×0.4) =1×10 = 90.6 =40   =10 (4)8.98×101 (5)1.25×(0.8+0.4) (6)3.69+3.69×99 =8.98×100+8.98×1 =1.25×0.8+1.25×0.4 =3.69(1+99) =898+8.98 =1+0.1 =369  =906.98 =1.1  (7)4.52×9.9+0.452 (8)0.125×32×32×0.5 (9)19.8×4-9.8×4 =4.52(9.9+0.1) =(0.125×8)×(4×0.5×32) =4×(19.8-9.8) =45.2 =1×6.4 =40 =6.4 (10)(8-0.8)×1.25 (11)0.25×1.5×40 (12)3.6×5.8-36×0.08 =8×1.25-0.8×1.25 =0.25×40×1.5 =3.6×(5.8-0.8) .  =10-1 =10×1.5 =3.6×5 =9 =15 =18 .     .
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