【用递等式计算,能简算的要简算(8.4+16.35)+4.6-查字典问答网
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  【用递等式计算,能简算的要简算(8.4+16.35)+4.6524.73-8.92+5.37-11.0812.7+[18.4+(19.74-9.34)](125×99+125)×645600÷(28÷4)(13.1-9.28)-(4.5-2.74)23.404-(1.47+10.56)78×4×2×125】

  用递等式计算,能简算的要简算

  (8.4+16.35)+4.65 24.73-8.92+5.37-11.0812.7+[18.4+(19.74-9.34)](125×99+125)×645600÷(28÷4)(13.1-9.28)-(4.5-2.74) 23.404-(1.47+10.56)78×4×2×125

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2020-04-1812:08
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汪泉

  (1)(8.4+16.35)+4.65

  =8.4+(16.35+4.65)

  =8.4+21

  =29.4;

  (2)24.73-8.92+5.37-11.08

  =(24.73+5.37)-(8.92+11.08)

  =30.1-20

  =10.1;

  (3)12.7+[18.4+(19.74-9.34)]

  =12.7+[18.4+10.4]

  =12.7+28.8

  =41.5;

  (4)(125×99+125)×64

  =125×(99+1)×64

  =125×100×64

  =12500×64

  =800000;

  (5)5600÷(28÷4)

  =5600÷7

  =800;

  (6)(13.1-9.28)-(4.5-2.74)

  =3.82-1.76

  =2.06;

  (7)23.404-(1.47+10.56)

  =23.404-12.03

  =11.374;

  (8)78×4×2×125

  =78×(4×2×125)

  =78×(8×125)

  =78×1000

  =78000.

2020-04-18 12:12:28
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