Question

resolva por dois métodos diferentes cada uma das expressões. A) 30- (6 - 1) B) 15 + ( -3 + 7) C) -6 - ( -3 + 2) D)18- ( -5 -2 -3 ) E) 4 + ( 3 - 5) + (- 2 - 6) F) 20 - ( -6 + 8) - ( -1 + 3) G) 35 + (-3) - (-4 + 7 + 2) H) 8 + ( 3 - 10) - (3 + 5 _ 20)

Answer 1

$A) 30- (6 - 1)30-5\to 25 \\\\\\ B) 15 + ( -3 + 7)\to 15 +4\to 19\\\\ \\C) -6 - ( -3 + 2)\to -6-(-1)\to -6+1\to -5 \\\\\\D)18- ( -5 -2 -3 )\to 18-(-10)\to 18+10\to 28\\\\ \\E) 4 + ( 3 - 5) + (- 2 -6)\to 4+(-2)+(-8)\to 4-2-8\to -6 \\\\\\F) 20 - ( -6 + 8) - ( -1 + 3)\to 20-2-2\to 16\\ \\\\ G) 35 + (-3) - (-4 + 7 + 2)\to 35+(-3)-(5)\to 35-3-5\to 27 \\\\\\H) 8 + ( 3 - 10) - (3 + 5- 20)\to 8+(-7)-(8-20)\to\\ 8-7-(-12)\to 8-7+12\to 20-7\to13$