①4x÷ =6
②160%x+4.5×20%=8.9
③1.8:x=27:60
×= = =
9.87﹣4.8= 0.8×125%= 35.7+3.07=
523﹣23×7
4.97+6.38+5.03﹣4.38
60×()
×3.2+5.6×0.5+1.2×50%
()÷