1.23÷6÷0.5=0.205÷0.5=0.41
81÷1.62×2.4=50×2.4=120
6.42×5.7+1.43×64.2=6.42×5.7+14.3×6.42=6.42×(5.7+14.3)=6.42×20=128.4
0.75×18÷0.15=13.5÷0.15=90
2.5×6.9×4=2.5×4×6.9=10×6.9=69
2.07÷0.23÷0.45=9÷0.45=20
1.23÷6÷0.5=0.205÷0.5=0.41
81÷1.62×2.4=50×2.4=120
6.42×5.7+1.43×64.2=6.42×5.7+14.3×6.42=6.42×(5.7+14.3)=6.42×20=128.4
0.75×18÷0.15=13.5÷0.15=90
2.5×6.9×4=2.5×4×6.9=10×6.9=69
2.07÷0.23÷0.45=9÷0.45=20