a,16 X 50X-25X(-250)
=(16 X-25)X50X(-250)
=-400X50X-250
=-20000X-250
=5000000
b,-54X76+12X(-76)
=76X(-54-12)
=76X(-66)
=-5016
c,32X(-64)-64X68
=-64X(32+68)
=-64X100
=-6400
d,19X42.(-19)+38X5
=19X(42-1)+19X2X5
=19X41+19X10
=19X(41+10)
=19X51=969
a) 16.50.(-25).(-250)
=[16.(-25)].50.(-250)
=-400.50.(-250)
=-20000.(-250)
=5000000
b,-54.76+12.(-76)
=76.(-54-12)
=76.(-66)
=-5016
c,32.(-64)-64.68
=-64.(32+68)
=-64.100
=-6400
d,19.42.(-19)+38.5
=19.(42-1)+19.2.5
=19.(42-1)+19.(2.5)
=19.41+19.10
=19.(41+10)
=19.51
=969
a. 16\(\times\)50\(\times\)(-25)\(\times\)(-250)
=(4\(\times\)4)\(\times\)50\(\times\)25\(\times\)250
=4\(\times\)4\(\times\)50\(\times\)25\(\times\)250
=(4\(\times\)25)\(\times\)(4\(\times\)250)\(\times\)50
=100\(\times\)1000\(\times\)50
=5000000
b. -54\(\times\)76+12\(\times\)(-76)
=54\(\times\)(-76)+12\(\times\)(-76)
=(-76)\(\times\)(54+12)
=(-76)\(\times\)66
= -5016
c. 32\(\times\)(-64)-64\(\times\)68
=(-32)\(\times\)64-64\(\times\)68
=64\(\times\)(-32-68)
=64\(\times\)(-100)
= -6400
d. 19\(\times\)42\(\times\)(-19)+38\(\times\)5
=19\(\times\)(2\(\times\)21)\(\times\)(-19)+38\(\times\)5
=19\(\times\)2\(\times\)21\(\times\)(-19)+38\(\times\)5
=38\(\times\)21\(\times\)(-19)+38\(\times\)5
=38\(\times\)(-399)+38\(\times\)5
=38\(\times\)(-399+5)
=38\(\times\)(-394)
= -14972