Question

calcule : -7+15-3+9-4-1

Answer 1

-7+15-3+9-4-1

= 15 + 9 -7-3-4-1

= 15 + 9 - 10 - 5

= 15 + 9 - 15

= 24 - 15

= 9



________*
Gannicus
________*

Answer 2

-7+15-3+9-4-1
8-3+9-3-1
5+9-4-1
14-4-1
10-1
9