1. Thực hiện phép tính sau: a) 10-[(8 ²-48).5+(2 ³-10+8)]:28 b) 10-[(8 ²-48).5+(2 ³.10+8]:28 01/12/2021 Bởi Eloise 1. Thực hiện phép tính sau: a) 10-[(8 ²-48).5+(2 ³-10+8)]:28 b) 10-[(8 ²-48).5+(2 ³.10+8]:28
` a) ` ` 10 – [(8^2 – 48).5 + (2^3 – 10 + 8)] : 28 ` ` = 10 – [(64 – 48).5 + (8 – 10 + 8)] : 28 ` ` = 10 – [16.5 + 6] : 28 ` ` = 10 – (80 + 6) : 28 ` ` = 10 – 86:28 ` ` = 10 – 43/14 ` ` = 97/14 ` ` b) ` ` 10 – [(8^2 – 48).5 + (2^3 . 10 + 8)] : 28 ` ` = 10 – [(64 – 48).5 + (8.10 + 8)] : 28 ` ` = 10 – [16.5 + 80 + 8] : 28 ` ` = 10 – [86 + 88] : 28 ` ` = 10 – 87/14 ` ` = 53/14 ` Bình luận
` a) ` ` 10 – [(8^2 – 48).5 + (2^3 – 10 + 8)] : 28 `
` = 10 – [(64 – 48).5 + (8 – 10 + 8)] : 28 `
` = 10 – [16.5 + 6] : 28 `
` = 10 – (80 + 6) : 28 `
` = 10 – 86:28 `
` = 10 – 43/14 `
` = 97/14 `
` b) ` ` 10 – [(8^2 – 48).5 + (2^3 . 10 + 8)] : 28 `
` = 10 – [(64 – 48).5 + (8.10 + 8)] : 28 `
` = 10 – [16.5 + 80 + 8] : 28 `
` = 10 – [86 + 88] : 28 `
` = 10 – 87/14 `
` = 53/14 `