一、填空题1．计算1.135+3.346+5.557+7.768+9.979=_____.2.计算1.996+19.97+199.8=_____.3.计算9.8+99.8+999.8+9999.8+99999.8=_____.4.计算6.11+9.22+8.33+7.44+5.55+4.56+3.67+2.78+1.89=_____.5.计算1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19=__.6.计算2.89×4.68+4.68×6.11+4.68=_____.7.计算17.48×37-17.48×19+17.48×82=_____.8.计算1.25×0.32×2.5=_____.9.计算75×4.7+15.9×25=_____.10.计算28.67×67+32×28.67+573.4×0.05=_____.二、解答题11.计算172.4×6.2+2724×0.3812.计算0.00…0181×0.00…011963个01028个013.计算12.34+23.45+34.56+45.67+56.78+67.89+78.91+89.12+91.2314.下面有两个小数:求a+b,a-b,a×b,a÷b.a=0.00…0105b=0.00…0191994个01996个0
