Toán Lớp 6: ( 17 – 229) + ( 17 – 25 + 229) ; ( 125 – 679 + 145) – ( 125 – 679 ) 17. (15 – 16) + 16. (17 – 20) 15/ 15. (-176) + 15.76 + 100.15 1

0 bình luận về “Toán Lớp 6: ( 17 – 229) + ( 17 – 25 + 229) ; ( 125 – 679 + 145) – ( 125 – 679 ) 17. (15 – 16) + 16. (17 – 20) 15/ 15. (-176) + 15.76 + 100.15 1”

1. Giải đáp:

   ( 17 – 229) + ( 17 – 25 + 229) ; 

   = ( – 212) + (17 – 25 + 229)

   = ( – 212) + 221

   = – 212 + 221

   = 9
   ( 125 – 679 + 145) – ( 125 – 679 ) 

   = ( – 409) – ( 125 – 679)

   = ( – 409) – ( – 554)

   =  – 409 – ( – 554)

   = – 409 + 554

   = 145
    17. (15 – 16) + 16. (17 – 20) 

   = 17. ( -1) + 16( 17 – 20)

   = 17. ( -1) + 16.( – 3)

   = – 17 + 16. (- 3)

   = – 17 – 48

   = – 65
   15/ 15. (-176) + 15.76 + 100.15

   = 1.(- 176) + 15. 76+ 100. 15

   = 1.(- 176) + 1140 + 100. 15

   = 1.(- 176) + 1140 + 1500

   = (- 176) + 1140 + 1500

   = – 176 + 1140 + 1500

   = – 176 + 2640

   = 2464
   16/ 79.89 – 79. (-11) – 100.79 

   = $\frac{16}{79}$ . 89 – 79. (-11) – 100.79 

   = $\frac{16}{79}$ . 89 + 869 – 100.79

   = $\frac{16}{79}$ . 89 + 869 – 7900

   = $\frac{1424}{79}$ + 869 – 7900

   = $\frac{1424}{79}$ – 7031

   = – $\frac{554025}{79}$

   153.177 – 153.77 + 100. (-77) 

   = 27081 – 153.77 + 100. (-77) 

   = 27081 – 11781 + 100. (-77) 

   = 27081 – 11781 – 7700

   = 7600

   (-29). (85 – 47) – 85. (47 – 29) 

   = (-29). 38 – 85. (47 – 29)

   = (-29). 38 – 85. 18

   = – 1102 – 85. 18

   = – 1102 – 1530

   = – 2632
   (-167). (67 – 34) – 67. (34 – 167)

   = (-167). 33 – 67. (34 – 167) 

   = (-167). 33 – 67. ( – 133)

   = – 5511 – 67. ( – 133)

   = – 5511 + 8911

   = 3400

   $#thuanhuy$

   $\text{Gửi bn}$

    

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