答案
解:(+0.5)+(+0.3)+0+(-0.2)+(-0.3)+(+1.1)+(-0.7)+(-0.2)+(+0.6)+(+0.7)
=1.8(千克),
50×10+1.8=501.8(千克).
答:10袋大米共超重1.8千克,总重量是501.8千克.
解:(+0.5)+(+0.3)+0+(-0.2)+(-0.3)+(+1.1)+(-0.7)+(-0.2)+(+0.6)+(+0.7)
=1.8(千克),
50×10+1.8=501.8(千克).
答:10袋大米共超重1.8千克,总重量是501.8千克.