练习二十二,(选自教材,P81-82,),5.7 6,+3.6 8,9.4 4,6.8 5,+2.7,9.5 5,3.0 7,+2.9 3,6.0 0,7 1.4 5,+3 8.6,1 1 0.0 5,1 6.3,+6 3.8 3,8 0.1 3,4 5.4 9,+1 6.9,6 2.3 9,=9.44,=9.55,=6,=110.05,=80.13,=62.39,4.2 8,-1.3 8,2.9,8.0 0,-2.5 9,5.4 1,8.0 3,-6.9 8,1.0 5,8 8.7 0,-2 1.3 8,6 7.3 2,4 1.2 5,-2 8.6,1 2.6 5,3 0.1 0,-1 2.7 7,1 7.3 3,=2.9,=5.41,=1.05,=67.32,=12.65,=17.33,37.6,-,31.69=,3 7.6 0,3 1.6 9,-,5.9 1,5.91,答:,2010,年,重庆市城镇居民人均住房面积比农村居民人均住房面积少,5.91,平方米。,77,-,72.5=4.5,(岁),答:平均预期寿命将提高,4.5,岁。,45.2,23.3=21.9,(台),答:,2005,年全国农村平均每百户有电冰箱,21.9,台。,0.9,8.4,1.8,0.1,1.6,3.9,9,0.54,0.4,9.4,4.8,0.96,2.78+0.3+1.7,5.2+63.43+0.57,=2.78+2,=4.78,=2.78+,(,0.3+1.7,),=5.2+,(,63.43+0.57,),=5.2+64,=69.2,7.,用简便方法计算下面各题。,13.25,-,(,6.25+3.5,),5.17,-,2.8,-,1.2,=5.17,-(,2.8,+,1.2,),=5.17,-,4,=1.17,=13.25,-,6.25,-,3.5,=7,-,3.5,=3.5,42+9.63+1.37+28,=,(,42+28,),+,(,9.63+1.37,),=70+11,=81,7.02-3.5+0.98,=7.02+3.98-3.5,=11-3.5,=7.5,19.02+1.98=21,(亿),答:,2010,年,我国国内旅游人数达,21,亿人次。,(,1,),39.3,-,38.4=0.9,(),答:病人体温升高了,0.9,。,(,2,),39.3,-,37.6=1.7,(),答:病人最高体温与最低体温相差,1.7,。,2.65-0.15+0.64=3.14,(米),答:,9,号运动员跳了,3.14,米。,21.13,37.76,40.68,5.86,14.66,74.87,152.87,答:算出的结果比正确结果少,0.53.,