756- 193-207=756-( 193+207)=756-400=356

125*25*32=( 125*8)*(25*4)= 1000* 100= 100000

497-299=497-300+ 1= 198

375+2 19+38 1+225=(375+225)+(2 19+38 1)=600+600= 1200

35*8+35*6-4*35=35*(8+6-4)=35* 10=350

125*(40+8)= 125*40+ 125*8=5000+ 1000=6000

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