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简便方法计算题1/2×2/5+9/25÷9/20

1/2×2/5+9/25÷9/20 =1/5+9/25×20/9 =1/5+4/5 =1

记得好评哦

望采纳谢谢。(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10 (2)3.5-7+6.5 =3.5+6.5-7 =3 (3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25 (4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10 (5)12.5×7.4×0.8 =12.5×0.8×7.4 =74 (6)6.5×9.5+6.5×0...

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

16. 8 × 4/5 + 8 × 11/5 17. 31 × 5/6 – 5/6 18. 9/7 - ( 2/7 – 10/21 ) 19. 5/9 × 18 – 14 × 2/7 20. 4/5 × 25/16 + 2/3 × 3/4 21. 14 × 8/7 – 5/6 × 12/15 22. 17/32 – 3/4 × 9/24 23. 3 × 2/9 + 1/3 24. 5/7 × 3/25 + 3/7 25. 3/14 ×× 2/3 ...

有一个农场有50头奶牛,25只羊,后来奶牛卖掉了5头,羊卖掉了10只,求剩下的牛是剩下的羊的几倍? (50-5)/(25-10)=3

这种题要整360道?出题的人也太弱智了吧?

题目:李大伯4小时共给820棵苹果树喷了药水.照这样计算,6小时能喷多少棵苹果树? 解题步骤: 1、先计算出李大伯每个小时可以给多少棵苹果树喷药 820÷4=205 2、计算6个小时可以喷多少棵苹果树 205×6=1230 3、得出最后答案:李大伯6小时可以喷1230...

简便计算(26-14)×8 50×(2+80) (10×12)-63 (27-23)×12 (38-16)×24 (24+38)×6 (87-42)×15 (84-15×3) 16×(49-28) 45×(84-48] ) (58+37)×6 (64-9)×5 95×(64-45) (19-14)×9 5×(6+42) (81-70)×6 (9+31)×11 ...

9.8X25 =(10-0.2)X25 =10X25-0.2X25 =250-5 =245

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