76×20= 514﹣300= 3.4+6= 9÷9%= 24×=
÷= 62= 8.7+= ﹣0.8= ﹣×0=
2x-30%x=1.9+÷ 4x-3(20-x)=3
0.3:x= :51
2x+3×0.9=24.7
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