Simple calculation of 27 * 45 + 27 * 54 + 27
27*45+27*54+27
=27×(45+54+1)
=27×100
=2700
Simple calculation of 5.3-1 and 23-0.54 of 50
=5.3 - (1 and 23 / 50 + 0.54)
=5.3-2
=3.3
3 - &
√3-² =√(1/3²)=1/3