1. 次の計算をせよ。
(+16)-(-1112)+(-1.8)-(+43)-(-98)
(-1516)+(-2324)-(-0.2)-(+43)+(+76)
(-0.82)-(-2915)+(-76)-(+45)+(-53)
(+18)-(+79)+(-524)-(-718)+(+109)
(+16)-(-1112)+(-1.8)-(+43)-(-98)
=16+1112-95-43+98
=20+110-216-160+135120
=265-376120
=-111120
=-3740
(-1516)+(-2324)-(-0.2)-(+43)+(+76)
=-1516-2324+15-43+76
=-225-230+48-320+280240
=328-775240
=-447240
=-14980
(-0.82)-(-2915)+(-76)-(+45)+(-53)
=-4150+2915-76-45-53
=-123+290-175-120-250150
=290-668150
=-378150
=-6325
(+18)-(+79)+(-524)-(-718)+(+109)
=18-79-524+718+109
=9-56-15+28+8072
=117-7172
=4672
=2336
