Thực hiện phép tính a) 5^18:5^16+1^2020+2020^0 b) 580:[180-2(5^3-4^3)]+7^3 c) 12×4^3-2^2×5^2+12×6^2 d) {106-[64+4(17-14)²]}³ e) 15^2021:15^2020+2021^

0 bình luận về “Thực hiện phép tính a) 5^18:5^16+1^2020+2020^0 b) 580:[180-2(5^3-4^3)]+7^3 c) 12×4^3-2^2×5^2+12×6^2 d) {106-[64+4(17-14)²]}³ e) 15^2021:15^2020+2021^”

1. `a) 5^18:5^16+1^2020+2020^0`

   `=5^(18-16)+1+1`

   `=5^2+1+1`

   `=25+2`

   `=27`

   `b)580:[180-2(5^3-4^3)]+7^3`

   `=580:[180-2.61]+343`

   `=580:[180-122]+343`

   `=580:58+343`

   `=10+343`

   `=353`

   `c)12.4^3-2^2 . 5^2+12. 6^2`

   `=12.64-4.25+12.36`

   `=768-100+432`

   `=668+432`

   `=1100`

   `d){106-[64+4(17-14)^2]}^3`

   `={106-[64+4.9]}^3`

   `={106-100}^3`

   `=6^3`

   `=216`

   `e)15^2021:15^2020+2021^0`

   `=15^(2021-2020)+1`

   `=15+1`

   `=16`

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2. Giải thích các bước giải:

   `a) 5^18:5^16+1^2020+2020^0`
   `=5^(18-16)+1+1`
   `=5^2+1+1`
   `=25+1+1`
   `=26+1`
   `=27`
   `b) 580:[180-2(5^3-4^3)]+7^3`
   `=580:[180-2(125-64)]+343`
   `=580:[180-2.61]+343`
   `=580:[180-122]+343`
   `=580:58+343`
   `=10+343`
   `=353`
   `c) 12×4^3-2^2×5^2+12×6^2`
   `=12\times64-4\times25+12\times36`
   `=768-100+432`
   `=668+432`
   `=1100`
   `d) {106-[64+4(17-14)²]}³`
   `={106-[64+4.3^2]}^3`
   `={106-[64+4.9]}^3`
   `={106-[64+36]}^3`
   `={106-100}^3`
   `=6^3`
   `=216`
   `e) 15^2021:15^2020+2021^0`
   `=15^(2021-2020)+1`
   `=15^1 +1`
   `=15+1`
   `=16`

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