(1)-(2)数学 要对

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(1)-(2)数学 要对
 

807-5134/17 6.36*4+3.64/1/4
=807-302 =6.36*4+3.64*4
=505 =(6.36+3.64)*4
=10*4
=40

  1.  =807-302 =505

  2. =25.44+0.91 =24.53

(1)807-5134÷17 (2)6.36*4+3.64÷1/4
=807-302 =6.36×4+3.64÷(1÷4)
505 =6.36×4+3.64÷0.25
=25.44+3.64÷0.25
=25.44+14.56
=40