1.273-73-27=273_(73+27)=273_100=173
2.45+24+55+76=(45+55)+(24+76)=100+100=200
3.250×15×4×2=(250*4)*(15*2)=1000*30=30000
4.132×68+132×32=132*(68+32)=132*100=13200
1.
273-73-27
=273-(73+27)
=273-100
=173
2.
45+24+55+76
=45+55+24+76
=100+100
=200
3.
250×15×4×2
=250×4×15×2
=1000×30
=30000
4.
132×68+132×32
=132(68+32)
=132×100
=13200