15-4.8+9.06 8.2+7.92+22.8
89-15.73-23.27 27.9 -(19+7.9)
0.7+2.61.9+2.6
2.8+3.63.6+2.8
4-3.5+0.54-(3.5+0.5)
7.5-3.3+0.57.5-0.5+3.3
12.78+5.2+4.8
18.17-2.9-3.1
9.85+4.7-9.85+6.3
27.3+73.2+72.7 7.6-5.59+2.04 43.25-10.4-3.25
3.8+1.37+6.2+12.63 76.38-27.74-12.36
27.3+73.2+72.7 43.25- 10.4-3.25
5.85-(1.89+1.85) 14.37-(7.42-4.37)
64.3-18.75+15.7-11.25
①4.78+0.4+1.6
②10.38- 3.3 – 6.7
③5.02-2.8+1.98
④93.45- 8.6 - 3.45
⑤41+8.68+49+1.32
⑥3.9+0.1-3.9+0.1
5.27-(0.27+3.26)=5.27
4.8+1.99=4.8(2 )
废旧物品
饮料罐
废旧纸张
废旧电池
矿泉水瓶
质量/千克
25.3
43.26
5.71
6.74