四年级四则运算500道 四年级小数脱式计算题（加减乘除法）要500道!

题目：

四年级小数脱式计算题（加减乘除法）要500道!不要简便的!加减乘除都要!要脱式

解答：

2.1÷7÷0.1=5×2.1＋2.1=2.5×4×0.5=50×0.04＋420=3.4÷0.1－21=100×2.1×0.03=6.9÷3＋19=3.7＋1.26＋0.74=2.34－1.34×0=(1.5＋2.5)×0.77=31－0.25－0.75=34.1＋21.5＋0.9=9.7×12＋0.3×12=38×0.01＋0.02=(1.2＋0.16)×0.1=0.03÷0.01＋0.3=1.25×8×4=3.6＋5.8＋4.2=6.8×20÷5=0.34÷17－0.02=(1.5＋0.5)÷2=0.8×1.25×15=0.24÷4×6=0.9÷0.3×7=30÷0.2÷1.5=9.8－2.9－3.1=1.02×8－0.16=0.25×0.4÷0.1=0.42×4×0.25=0.8÷0.1×0.5=2.8÷0.7×20=0.8×0.6÷2=5×(3.2－2.6)=5.4÷0.9＋0.8=(1.4－0.8)÷0.6=3.26÷2×0.01=(5.1－2.7)÷0.6=7.6－0.7－0.3=1.25×8×0.74= 1.8＋2.2＋6.4=0.6×5＋0.4×5=4.27－0.6－0.4=3.6＋0.8＋0.2=8.54－1.7－2.3=720÷8÷0.1=0.75×4÷7.5=2.5×0.7×4=0.9×100÷3=2÷(6.4＋4.6)=2.8÷0.7＋6=19.6÷0.2÷5=7.86＋7.86×9=0.25＋0.75=9.9＋0.51＋0.1=7.3×2.5×4=1.25×8×3.7=12－6.2－3.8=2.4÷4＋5.6÷4=7.6－0.7－0.3=1.25×8×0.74=1.8＋2.2＋6.4=0.6×5＋0.4×5=6.02×0.3＋0.3=32.1＋2.5×0.4=45.7－5.5×6=10.21×3－10.21=45.7－5.5×6=10×0.6－0.6=13.7×0.25×40=