N5.
(35-5):5=30:5=6
45:9+72:9=5+8=13
81:(95-86)=81:9=9
(456+449)+27=905+27=932
9:3+5×(68-64)=3+5×4=3+20=23
63:9+(450+90)=7+540=547
3×5+(456-400)=15+56=71
1000-(67+33):1=1000-100:1=900
5×(567-558)+100=5×9+100=145
36:6+(590-530)=6+60=66
N5.
(35-5):5=30:5=6
45:9+72:9=5+8=13
81:(95-86)=81:9=9
(456+449)+27=905+27=932
9:3+5×(68-64)=3+5×4=3+20=23
63:9+(450+90)=7+540=547
3×5+(456-400)=15+56=71
1000-(67+33):1=1000-100:1=900
5×(567-558)+100=5×9+100=145
36:6+(590-530)=6+60=66