72 * 72 + 72 + 72 * 27 * 72 by simple method

72 * 72 + 72 + 72 * 27 * 72 by simple method

If 72 * 72 + 72 + 72 * 27 * 72 is changed to 72 * 72 + 72 + 72 * 27, it can be simply calculated
72*72+72+72*27
=72×(72+1+27)
=72×100
=7200
Did you make a mistake?

-How to do 4.41 × 0.59 + 0.41 × 1.59 with a simple method

-4.41×0.59+0.41×1.59
=-4.41×(1-0.41)+0.41×1.59
=-4.41×1+4.41×0.41+0.41×1.59
=-4.41+(4.41+1.59)×0.41
=-4-0.41+6×0.41
=-4+(6-1)×0.41
=-4+5×0.41
=-4+2.05
=-1.95

A simple method of 0.41 * 1.59-8.43 * 0.59 + 4.42 * 0.59

Original formula = 0.41x (1 + 0.59) - 0.59x8.43 + 4.42x0.59
=0.59x(4.42+0.41-8.43)+0.41
=0.59x3.6+0.41
=3.6x(1-0.41)+0.41
=3.6-2.6x0.41
=2.534

4.83×0.59+0.41×1.59-0.324×5.9=______ ．

4.83 × 0.59 + 0.41 × 1.59-0.324 × 5.9 = 4.83 × 0.59 + 0.41 × (1 + 0.59) - 3.24 × 0.5.9 = 4.83 × 0.59 + 0.41 × 1 + 0.41 × 0.59-3.24 × 0.59 = (4.83 + 0.41-3.24) × 0.59 + 0.41 = 2 × 0.59 + 0.41 = 1.18 + 0.4 = 1.58