四年级口算
23×40= 54÷3= 18×30= 60÷30= 70×50= 250÷50= 14×60= 80÷40= 18
23×40= 54÷3= 18×30= 60÷30= 70×50= 250÷50= 14×60= 80÷40= 18×50= 16×30= 1.25+2.3= 35.7-2.4= 12.3+4.06= 0.75+0.4= 1.34+0.8= 9.5-2.7= 1.8+8.18= 7.82-7.2= 8.7+0.03= 2.7+3.9= 9.3-8.8= 1.9+25.79= 4.5-3.26= 5.1-1.9= 2.2+5.7= 4.8-2.5= 18.3-3.7= 2.9+15.9= 6.3+3.6= 6.7-4.5= 6.8-0.7= 27.3+2.15= 23.5+1.68= 53.16+3.54= 6.6-3.7= 7.2-2.7= 12.3+3.7= 5.3+4.47= 2.8+1.9= 3.2+12.76= 3.25-0.12= 4.5-2.1= 5.8+6.9= 1.5+4.85= 16.8+5.4= 3.6-1.3= 24.6+2.4= 8.1+1.2= 2.45+5.5= 0.5+2.6= 93.1-20.9= 53.4-2.4= 5-0.08= 96.3-56.2=

