Resolva as expressões:
a) (1/2)³ - 1/4 × 7/2 ÷ 11/8 =
b) (3,1)² + 1/2 - 2 × 0,02=
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a) (1/2)³ - 1/4x7/2 ÷ 11/8 =
(1/8) - 7/8 ÷ 11/8 =
(1/8) - 7/8x8/11 =
(1/8) - 7/11 = (11.1 - 8.7)/88 = 11 - 56/88 = 45/88
b) (3,1)² + 1/2 - 2x0,02 =
(31/10)² + 1/2 - 2x2/100 =
961/100 + 1/2 - 4/100 =
961/100 - 4/100 + 1/2 =
957/100 + 1/2 =
957/100 + 50/100 = 1007/100
(1/8) - 7/8 ÷ 11/8 =
(1/8) - 7/8x8/11 =
(1/8) - 7/11 = (11.1 - 8.7)/88 = 11 - 56/88 = 45/88
b) (3,1)² + 1/2 - 2x0,02 =
(31/10)² + 1/2 - 2x2/100 =
961/100 + 1/2 - 4/100 =
961/100 - 4/100 + 1/2 =
957/100 + 1/2 =
957/100 + 50/100 = 1007/100
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