1)444× 209:(10 105 - 9957) =627
=444×209:148=
=627
2)344×627 : (9 107 -8978)=1672
=344×627:129=
=1672
3)276×775: (30026 -29 796) =930
=276×775:230=
=930
4)(912:114+6440:23):16=18
=(8+280):16=
=288:16=
=18
