五年级上册数学小数混合运算专项练习

五年级上册数学小数混合运算专项练习姓名：____________日期：____________用时：____________※（能简算的简算）※0.74×102＝0.74×(100+2)＝0.74×100+0.74×2＝75.480.86×199＝0.86×(200-1)＝172-0.86＝171.141.5×(7.7-1.5)＝1.5×6.2＝9.3(8.3-4.3)×1.3＝4×1.3＝5.20.5×98＝0.5×(100-2)＝50-1＝495.9×4.8-3.9×5.9＝5.9×(4.8-3.9)＝5.9×0.9＝5.313.8×3.7+3.7×6.8＝3.7×(3.8+6.8)＝3.7×10.6＝39.224.3×7.7-4.8×4.3＝4.3×(7.7-4.8)＝4.3×2.9＝12.479.6×7.5+6.4×9.6＝9.6×(7.5+6.4)＝9.6×13.9＝133.440.8×99＝0.8×(100-1)＝80-0.8＝79.2(5.9+7.6)×0.4＝13.5×0.4＝5.41.4×1.9-1.5＝2.66-1.5＝1.16五年级上册数学小数混合运算专项练习姓名：____________日期：____________用时：____________※（能简算的简算）※0.3×199＝0.3×(200-1)＝60-0.3＝59.79×5.6+9×8.4＝9×(5.6+8.4)＝9×14＝1263.7×5.7+8.5×3.7＝3.7×(5.7+8.5)＝3.7×14.2＝52.540.55×99＝0.55×(100-1)＝55-0.55＝54.451.9×(2.5-0.4)＝1.9×2.1＝3.99(6.6-3.4)×0.3＝3.2×0.3＝0.963.7×3-3×2.6＝3×(3.7-2.6)＝3×1.1＝3.30.83×99＝0.83×(100-1)＝83-0.83＝82.171.5×(7.7-1.4)＝1.5×6.3＝9.451.3×(7.3-2.8)＝1.3×4.5＝5.850.66×98＝0.66×(100-2)＝66-1.32＝64.689×7.7+1.6×9＝9×(7.7+1.6)＝9×9.3＝83.7五年级上册数学小数混合运算专项练习姓名：____________日期：____________用时：____________※（能简算的简算）※2.4×5.2+7.7×2.4＝2.4×(5.2+7.7)＝2.4×12.9＝30.9610×4.3+8.6×10＝10×(4.3+8.6)＝10×12.9＝1290.7×201＝0.7×(200+1)＝140+0.7＝140.70.6×199＝0.6×(200-1)＝120-0.6＝119.41.3×1.3+6.8＝1.69+6.8＝8.490.7×1.5+7.3＝1.05+7.3＝8.353.4×5.6+7.5×3.4＝3.4×(5.6+7.5)＝3.4×13.1＝44.540.5×98＝0.5×(100-2)＝50-1＝49(3.3+6.3)×1.8＝9.6×1.8＝17.28(4.3+7.5)×1.6＝11.8×1.6＝18.880.69×199＝0.69×(200-1)＝138-0.69＝137.313.8×3+1.3×3＝3×(3.8+1.3)＝3×5.1＝15.3五年级上册数学小数混合运算专项练习姓名：____________日期：____________用时：____________※（能简算的简算）※0.65×98＝0.65×(100-2)＝65-1.3＝63.77.3×3.8+6.9×7.3＝7.3×(3.8+6.9)＝7.3×10.7＝78.110.7×(7.3+3.2)＝0.7×10.5＝7.35(5.9+6.5)×1.4＝12.4×1.4＝17.360.7×101＝0.7×(100+1)＝70+0.7＝70.77.6×9+8.3×9＝9×(7.6+8.3)＝9×15.9＝143.10.69×98＝0.69×(100-2)＝69-1.38＝67.625.9×7+3.4×7＝7×(5.9+3.4)＝7×9.3＝65.11.9×1.3-1.5＝2.47-1.5＝0.97