28道小数乘除法比较难的

一、直接写出结果.0.8＋0.6=1.25×80=5.24＋3.76=625×0.8=4.2－3.6=0.32÷16=13＋0.26=9.6÷16=14.5－0.24=4÷8=1.3＋8.46=0.8

先把小数转换成分数,然后用分数的乘除法计算

乘：1.56乘246.7乘1.023.27乘0.983.5乘1.25.4乘0.90.84乘1.52.4乘0.41.08乘7.20.36乘4.50.21乘0.713.84乘0.990.845乘1.80.

1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）

0.2*5,0.5*0.2,2.5*0.5

2.9*3249*3.750/2.54.7/53.6*766/3.3

4.5×0.07=6.3÷0.09=2.5×3.6=19.8÷3.3=5÷0.25=0.76÷0.4=2.36×0.22=2.8×4.58=3.57÷4.2=82.8÷36=45×2.46=3.6÷0

0.396÷1.2=0.756÷0.36=15.6×13=0.18×15=0.025×1.4=3.06×36=0.04×0.12＝3.84×2.6≈5.76×3＝（保留一位小数）7.15×22=90.

先把小数画成分数,再乘除,除以一个数等于乘以这个数的倒数,同号得正,异号得负

1.1x1.1=1.211.2x1.2=1.441.3x1.3=1.691.4x1.4=1.961.5x1.5=2.251.6x1.6=2.561.7x1.7=2.891.8x1.8=3.241.9x

6.9＋4.8＋3.10.456＋6.22＋3.7815.89＋(6.75－5.89)4.02＋5.4＋0.985.17－1.8－3.213.75－(3.75＋6.48)3.68＋7.56－2.687

5.3×6.3+2.3=4.4×7.3+5.3=4×8.8+1.5=4.1×0.8-0.2=9.9×1.4+0.6=6.4×2.4+3.6=12.48-4×9.7=9.8×1.3-0.3=4.8×9.

2554555526

1.2÷30.48÷64.6÷2314×0.56.8÷40.72÷120.7×1.10.72÷49.6÷65.2÷1312.5÷50.12×58÷0.50.32÷160.5×1.10.5＋0.141.

4.5×0.07=6.3÷0.09=2.5×3.6=19.8÷3.3=5÷0.25=0.76÷0.4=2.36×0.22=2.8×4.58=3.57÷4.2=82.8÷36=45×2.46=3.6÷0

去掉小数点,用证书乘除法算,然后数小数点后一共有几位,由得到的答案向前移动几位,加小数点.

1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-（3/2+4/5）

5.6×2.93.77×1.80.02×965.22×0.39.99×0.024.67×0.95×2.441.666×6.19.432×0.0025.6×6.54.88×2.95.61×4.38.9×

1.5×4=2.5×4=0.13×4=2.4-0.8=5.4÷10=4.2×1000=0.45÷0.15=3.6÷0.1=O.75+0.8=8.5×100=3.2÷100=0.18×0.3=8.5÷1

34×25=67÷2=12×445=3÷13=65÷35=56÷32=27×14=1-12×27=6×12÷14=512-18×23=15÷35=12÷47=98×8=512÷10=710÷45=56