Quelltext der Seite M05 Addition und Subtraktion ganzer Zahlen


1. 63 + 52 – [ 17 – (58 – 111) ] = 115 – [ 17 – ( – 53) ] = 115 – [ 17 + 53 ] = 115 – 70 = 45

2. 345 – (443 – 518) + (678 – 876) = 345 – ( – 75) + ( – 198) = 345 + 75 – 198 = 420 – 198 = 222

3. – 1712 – [(–342 + 63)  (431 – 84)] = – 1712 – [ – 279 – 347] = – 1712 – [ – 626] = – 1712 + 626 = – 1086

4. – 809 – [(– 262 + 85) – (251 – 63)] = – 809 – [ – 177 – 188] = – 809 – [ – 365] = – 809 + 365 = – 444