1, Tính a, 85:17+7.2-16:23+8 b, 17.46+39.51+22.46 2, Tìm x a, 75-25:(x+3) = 2mũ 6 + 6 b, 5.7 mũ 2 -2 mũ x = 3.71 c,x mũ 3 -2. 5 mũ 2 = 166 ( Giái giúp

0 bình luận về “1, Tính a, 85:17+7.2-16:23+8 b, 17.46+39.51+22.46 2, Tìm x a, 75-25:(x+3) = 2mũ 6 + 6 b, 5.7 mũ 2 -2 mũ x = 3.71 c,x mũ 3 -2. 5 mũ 2 = 166 ( Giái giúp”

1. CHÚC BẠN HỌC TỐT!!!!

   `1.`

   `a,85:17+7.2-16:23+8`

   `=5+14-16/23+8`

   `=19-16/23+8`

   =18`7/23` + `8`

   =10`7/23`

   `b,17.46+39.51+22.46`

   `=46.(17+39+22)`

   `=46.78`

   `=3588`

   `2.`

   `a,75-25:(x+3)=2^6+6`

   `75-25:(x+3)=70`

   `25:(x+3)=5`

   `x+3=5`

   `x=2`

   Vậy `x=2`

   `b, 5.7^ 2 -2^x = 3.71`

   `245-2^x=213`

   `2^x=32`

   `2^x=2^5`

   `=>x=5`

   Vậy `x=5`

   `c,x ^ 3 -2. 5 ^2 = 166`

   `x^3-50=166`

   `x^3=216`

   `x^3=6^3`

   `=>x=6`

   Vậy `x=6`

    

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2. `1.`

   `a,85:17+7.2-16:23+8`

   `=5+14-16/23+8`

   `=19-16/23+8`

   =18`7/23` + `8`

   =10`7/23`

   `b,17.46+39.51+22.46`

   `=46.(17+39+22)`

   `=46.78`

   `=3588`

   `2.`

   `a,75-25:(x+3)=2^6+6`

   `75-25:(x+3)=70`

   `25:(x+3)=5`

   `x+3=5`

   `x=2`

   Vậy `x=2`

   `b, 5.7^ 2 -2^x = 3.71`

   `245-2^x=213`

   `2^x=32`

   `2^x=2^5`

   `=>x=5`

   Vậy `x=5`

   `c,x ^ 3 -2. 5 ^2 = 166`

   `x^3-50=166`

   `x^3=216`

   `x^3=6^3`

   `=>x=6`

   Vậy `x=6`

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