计算题 5﹣x=3 2:5=0.75:x 614115﹣517440÷168 (3.3×6.3×0.6)÷(1.8+2.7×1.9) 18﹣2÷(3+1)×20 2.74﹣0.56×(2﹣1+2.275)
5+2+7= 8+5+4= 7+5+0= 5+6+3=
7+1+10= 2+7+10= 7+3+8= 4+6+5=
5+2+10= 5+4+10= 6+8+3= 5+6+5= 2+6+9= 5+5+7=
7+2+5= 2+5+10= 8+7+2=17
5+2+9= 5+4+8= 6+2+3=11