Question

1) 21-(5-(-7)+2= 2) 2-(-1+7)-(-5)= 3) 50-(27-15)-21= 4) -8,5-21,2+(-1,5)-1,7= 5) -45,1+24,8-58,2= 6) -5,6+5,7-8,2+0,6=

Answer 1

1. 7
2. 1
3. 17
4. -32,9
5. -78,5
6. -7,5

Answer 2

1)7
2)1
3)17
4)-15.9
5)11.7
6)3.7

Answer 3

1. 21 - (5 - (-7) + 2) = 21 - (5 + 7 + 2) = 21 - 14 = 7
2. 2 - (-1 + 7) - (-5) = 2 - 6 + 5 = 1
3. 50 - (27 - 15) - 21 = 50 - 12 - 21 = 17
4. -8.5 - 21.2 + (-1.5) - 1.7 = -8.5 - 21.2 - 1.5 - 1.7 = -32.9
5. -45.1 + 24.8 - 58.2 = -78.5
6. -5.6 + 5.7 - 8.2 + 0.6 = -7.5