1)945-4.205+2.420 2)2.587+835-5.221 3)-835-5.411+2.264 tolong pakai caranya ya...

1)945-4.205+2.420=
945-4.205= -3,260
-3,260+2.420= -840

2)2.587+835-5.221=
2.587+835=837.587
837.587-5.221=832.366

3)-835-5.411+2.264=
-835-5.411= -840.411
-840.411+2.264= -838.147

SEMOGA BERMANFAAT