新人教版五年级上册数学计算题练习一.doc

计算题练习一一、简便计算。 0.80.880.22 13243.756.3 23.40.813.47.2 12.78-(4.972.78)25.48-(9.4-0.52) 4.9+0.8-4.9+0.8 12.96-(2.96-1.52) 7.85+2.34-0.85+4.66 0.2516.24 (1.250.25)4 4.60.354.60.65 4.87.8780.52 3.141.931.40.81 6310.1-630.1 15.613.115.615.62.1 4.2994.2 56.59.95.65 2.951012.95 3.6102 3.2101 72125 994.3 3.22.51.25 2.50.3212.563.42.50.4 3201.258 4.914 35（0.352）二、解方程7=1.4 2.56=18.5 （+4）0.2=453.142=28.4 31.51.2=16.8 5-0.416=29.69（-0.5）=45 2(2.1)=9.8 （15+）42=60 0.24=15.2 7-2.4=1.84 1.29=6.12 1563=46.5 42.5-4=2 120.40.2=0.81203=20 7.51.5=5 4.2204=24