124 * 45 + 56 * 24-124 is calculated by simple algorithm,

124 * 45 + 56 * 24-124 is calculated by simple algorithm,


124*45+56*24-124
=124*45-124+56*24
=124*(45-1)+56*24
=124*44+56*24
=124*4*11+(40+16)(40-16)
=496*11+40^2-16^2
=5456+1600-256
=5200+1600
=6800



How to calculate 35035 △ 35 × 91? How to calculate 18000 △ 75 × 24? How to calculate 33066 △ 66?


35035÷(35×91)
=35035÷35÷91
=1001÷91
=11
18000÷75×24
=18000x24/75
=18000x8/25
=180x8x(100/25)
=5760
33066÷66
=(330x100+66)÷66
=330÷66x100+66÷66
=500+1
=501