2023年青島版五四制四年級數(shù)學上冊第八章節(jié)測試題及答案二

一填空。

第八單元測試卷〔B〕1.1.034×2.2的積是( )位小數(shù)。2.3.2+3.2+3.2+3.2+3.2=( )×3.2兩個因數(shù)的積是1.225,其中一個因數(shù)是兩位小數(shù),另一個因數(shù)至少是( 位小數(shù)。把3.091的小數(shù)去掉,這個數(shù)就擴大到原來的( )倍。里填上“>〞“<〞或“=〞。198×0.819895×0.995168×1.5168132×4.61320.78×1.10.786.2×0.996.2二選擇。(將正確答案的序號填在括號里1.以下各式中,積最小是( )。A.0.14×0.4 B.0.4×0.4 C.0.4×1.4A.660.6×3.4乘一個小數(shù),積()。B.6.606×34C.660.6×34A.小于0.99B.大于0.99C.不確定A.660.6×3.4乘一個小數(shù),積()。B.6.606×34C.660.6×34A.小于0.99B.大于0.99C.不確定三計算。1.直接寫出得數(shù)。0.7×0.9=0.14×0.2=1.7×0.01=1.87×0=5.5×10=2.6×0.5=0.12×6=7×0.08=1.8×0.05=2.用豎式計算。2.6×2=60×0.5=0.6×2=6.02×3.4=13.8×20=8.05×6.4=3.計算。(能簡算的要簡算)22.6-5.4×0.4-1.28 1.27×3.4+1.27×6.68.49+()×0.64 (1.9+3.3×3)×0.25四解決問題。3.645.243.538.62.53028.32.414千克,商場一共購進多少千克香蕉?35.(1)求長頸鹿的高度。(2)長頸鹿比梅花鹿高多少米?參考答案一、12.54.10005.<<>>><二、1.ABC三、1.0.630.0280.0170551.30.720.560.095.2301.22.6.02×3.4=20.468 13.8×20=276 8.05×6.4=51.523.22.6-5.4×0.4-1.28 1.27×3.4+1.27×6.6=22.6-2.16-1.28 =1.27×(3.4+6.6)=20.44-1.28 =1.27×10=19.16 =12.78.49+()×0.64 (1.9+3.3×3)×0.25=8.49+2.5×0.64 =(1.9+9.9)×0.25=8.49+1.6 =11.8×0.25=10.09 =2.95四、1.3.6×4×5.2=14.4×5.2=74.88(答:4臺織布機5.2小時織布74.88米。2.(43.5+38.6)×2.5+30=82.1×2.5+30=205.25+30=235.25(千米)答:兩地之間的距離是235.25千米。3.28.3×2.4+14+28.3=67.92+14+28.3=81.92+28.3=110.22(千克)答:商場一共購進110.22千克香蕉。4.(0.34×1.3+0.34)×2×3=(0.442+0.34)×2×3=0.782×2×3=4.692(答:一共走了4.692千米。5.(1)1.