38 .63.+37.38 12.53+53.172-53.84 35.34+35.38+65.75+64.45 29.87-29.23+64.71 87.23+13+13.93+70.71 5.125.2.41.8

0 bình luận về “38 .63.+37.38 12.53+53.172-53.84 35.34+35.38+65.75+64.45 29.87-29.23+64.71 87.23+13+13.93+70.71 5.125.2.41.8”

1. Đáp án:

    

   Giải thích các bước giải:

   38 .63.+37.38

   = 38(63+37)

   =38.100

   =3800

   12.53+53.172-53.84

   =53(12+172-84)

   =53.100

   =5300

   35.34+35.38+65.75+64.45

   =35(34+38) + 4875 + 2880

   =2520 + 4875 + 2880

   =10275

   29.87-29.23+64.71

   =29(87-23)+ 4544

   =1856+ 4544

   =6400

   87.23+13+13.93+70.71

   = 2001+13+1209+4970

   = 8193

   5.125.2.41.8

   =5.$5^{3}$.2.$2^{3}$ .41

   =$5^{4}$.$2^{4}$.41

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2. $38 .63+37.38$

   $=38 . (63 + 37)$

   $= 38.100$

   $=3800$

   $12.53+53.172-53.84$

   $= 53.(12+172 – 84)$

   $= 53 . 100$

   $= 5300$

   $35.34+35.38+65.75+64.45$

   $= 35(34+38) + 4875 + 2880$

   $= 35.72 + 4875 + 2880$

   $= 2520 + 4875 + 2880$

   $= 10275$

   $29.87-29.23+64.71$

   $= 29.(87-23) + 64.71$

   $= 29.64 + 64 .71$

   $= 64.(29+71)$
   $= 64 . 100$

   $= 6400$

   $87.23+13+13.93+70.71$

   $= 13(1+93) + 2001 + 4970$

   $= 1222 + 2001 + 4970$

   $= 8193$

   $5.125.2.41.8$

   $= 5.2 . 125.8.41$

   $= 10.1000.41$

   $= 410000$

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