27: 3 +(18+ 4) = ; 100 - 21:7×6 = ;63-12+ 9×5 =; 8× 4+ 5× 5+2 3 =.

1.18+(63:9+5)*3= 18+(7+5)*3=18+12*3=18+36=54 2.(17+81:9-18)+5*7=(17+9-18)+35=8+35=43 3.72-(54-18*2):9+4=72-(54-36):9+4=72-2+4=74 4.4*. (56:8+33:11)+400=4*(7+3)+400=40+400=440.

1) 31

2) 82

3) 96

4) 80