Question

Encotre o valor das expressões 7² ‐ 40 + 18: 3² ‐ 10

Answer 1

7² ‐ 40 + 18: 3² ‐ 10

49 - 40 + 18: 9 - 10

9 + 2 - 10

1

Answer 2

${7}^{2} - 40 + 18 \div {3}^{2} - 10 = \\ 49 - 40 + 18 \div {3}^{2} - 10 \\ 49 - 40 + 18 \div 9 - 10 \\ 49 - 40 + 2 - 10 \\ \bf1$