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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: 17. (15 – 16) + 16. (17 – 20) 15. (-176) + 15.76 + 100.15 79.89 – 79. (-11) – 100.79 153.177 – 153.77 + 100. (-77)

Toán Lớp 6: 17. (15 – 16) + 16. (17 – 20)
15. (-176) + 15.76 + 100.15
79.89 – 79. (-11) – 100.79
153.177 – 153.77 + 100. (-77)

Comments ( 1 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    17. (15-16) + 16. (17-20)
    =17.15-17.16+16.17-16.20
    =(-17.16+16.17)+(17.15-16.20)
    =0+(255-320)
    =0-65
    =-65
    ___________________________________
    15.(-176)+15.76+100.15
    =15.[(-176) + 76+ 100]
    =15.0
    =0
    ___________________________________
    79.89-79.(-11)-100.79
    =79.[89-(-11)-100]
    =79.0
    =0
    ___________________________________
    153.177-153.77+100. (-77)
    =153.[177-77]+(-7700)
    =153.100+(-7700)
    =15300+(-7700)
    =7600

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222-9+11+12:2*14+14 = ? ( )

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