题文

口算 1 5 + 4 5 = 2.25+1.75= 1- 3 8 = 12.5×8= 1.8÷0.3= 6.5÷5= 7.2÷90= 24.8÷8= 0.23×20= 5.6÷0.8= 5 8 - 1 8 = 40×0.9= 1.63+7= 7 10 - 3 10 = 6.1×0.7= 3 10 + 1 30 = 20.5-1.5= 35÷0.7= 2.5×4= 3-1 2 7 =

题型：解答题  难度：中档

答案

1 5 + 4 5 =1 2.25+1.75=4 1- 3 8 = 5 8 12.5×8=100 1.8÷0.3=6 6.5÷5=1.3 7.2÷90=0.08 24.8÷8=3.1 0.23×20=4.6 5.6÷0.8=7 5 8 - 1 8 = 1 2 40×0.9=36 1.63+7=8.63 7 10 - 3 10 = 2 5 6.1×0.7=42.7 3 10 + 1 30 = 1 3 20.5-1.5=19 35÷0.7=50 2.5×4=10 3-1 2 7 =1 5 7

据专家权威分析，试题“口算15+45=2.25+1.75=1-38=12.5×8=1.8÷0.3=6.5÷5=7.2÷90=..”主要考查你对  分数的加法和减法（异分母）  等考点的理解。关于这些考点的“档案”如下：