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

Toán Lớp 7: 1)(6^6-3^3.6^3+3^6) / (-52) 2)8^20+4^20/4^25+64^5 3)70^20/35^20 4)(0,8)^10/(0,4)^10 5)2^14.9^8/6^10.8^3

Toán Lớp 7: 1)(6^6-3^3.6^3+3^6) / (-52)
2)8^20+4^20/4^25+64^5
3)70^20/35^20
4)(0,8)^10/(0,4)^10
5)2^14.9^8/6^10.8^3

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    1)(6^6-3^3 .6^3+3^6)/(-52)
    =(2^6 .3^6-3^3 .3^3 .2^3+3^6)/(-52)
    =(2^6 .3^6-3^6 .2^3+3^6)/(-52)
    ={3^6.(2^6-2^3+1)}/(-52)
    =(3^6 .57)/(-52)
    =(729.57)/(-52)
    =(-41553)/52
    2){8^{20}+4^{20}}/{4^{25}+64^5}
    =(2^{60}+2^{40})/(2^{50}+2^{30})
    ={2^{40}(2^{20}+1)}/{2^{30}(2^20+1)}
    =2^{10}
    =1024
    3)(70^{20})/(35^{20})
    =(2^{20} .35^{20})/(35^{20}
    =2^20
    =1048576
    4) {0,8^{10}}/{0,4^{10})
    =(0,8/0,4)^{10}
    =2^{10}
    =1024
    5)(2^{14} .9^8)/(6^{10} .8^3)
    =(2^{14} .3^{16})/(2^{10} .3^{10} .2^9)
    =(2^{14} .3^{16})/(2^{19} .3^{10})
    =3^6/2^5
    =729/32
    Chúc bạn học tốt!!!
    #Rùa~ ~ ~

  2. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-7-1-6-6-3-3-6-3-3-6-52-2-8-20-4-20-4-25-64-5-3-70-20-35-20-4-0-8-10-0-4-10-5-2-14-9-8-6

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