45-15х6:18= 8+28:7х16= 25х3-15х4= 56+4х8-20=
1) 15*6=90 90:18=5 45-5=40 2) 28:7=4 4*16=64 8+64=72 3) 25*3=75 15*4=60 75-60=15 4) 4*8=32 56+32=88 88-20=68