975-147-23
=975-(147+23)
=975-170
=805
134x8+8x66
=8x(134+66)
=8x200
=1600
125x64
=125x8x8
=1000x8
=8000
365x99
=365x(100-1)
=36500-365
=36135
3000/125/8
=3000/(125x8)
=3000/1000
=3
99x25
=(100-1)x25
=2500-25
=2475
6x75+6x25
25x24
=25x4x6
=100x6
=600
12x15
=(10+2)x15
=150+30
=180