4 / 1 times 0.75-0.25 times 3 / 8 + 25% times 1 / 8 is easy to calculate,

4 / 1 times 0.75-0.25 times 3 / 8 + 25% times 1 / 8 is easy to calculate,

4 / 1 times 0.75-0.25 times 3 / 8 + 25% times 1 / 8 is a simple calculation, and it needs a long process
1/4×0.75-0.25×3/8+25%×1/8
=1/4×（0.75-3/8+1/8）
=1/4×1/2
=1/8

Simple calculation of 13.2 × 5 △ 13.2 × 5 + 25 × 99

13.2×5÷13.2×5+25×99
=（13.2÷13.2）x5x5+25x99
=25+25x99
=25x(1+99)
=25x100
=2500

Simple calculation: 400 △ 25=

400 ÷25
=4×100÷25
=4×4
=16

Ingenious calculation of 125 × 48 × 25

(125 * 8) * (6 * 25) = 1000 * 150 = 150000, is that simple enough