4.8 - (0.24 + 1.16) + 18 simple calculation 56.43 - (15.27 + 30.29) simple calculation

4.8 - (0.24 + 1.16) + 18 simple calculation 56.43 - (15.27 + 30.29) simple calculation

4.8-(0.24+1.16)+18
=4.8-1.4+18
=3.4+18
=21.4

How is it easy to use the fifth grade method to calculate 54.3 × 1.8 + 54.3 × 0.3-5.43?

Simple! 54.3 × 1.8 + 54.3 × 0.3-54.3 × 0.1 = (1.8 + 0.3-0.1) × 54.3 = 2 × 54.3 = 108.6
Hope it works for you

0.54 ^ 5 + 5 * 0.46 * 0.54 ^ 4 = how much? Is there any fast calculation method?

=0.54*0.54^4+2.3*0.54^4=2.84*0.54^4

Simple operation method: 1.56/5.2-5.2 * 0.05

1.56/5.2-5.2x0.05=(1.56x20-5.2x5.2)/(5.2x20)                                        =5.2x(0.3x20-5.2)/(5.2x20)                                        =(0.3x20-5.2)/20                                       =(0.3x10-2.6)/10                                       =0.4/10                                       =0.04