x+60%x=28
0.3:90%=12:x
3.2﹣2.5x=0.7
6.7﹣2.3=
100÷0.1=
3.14×22=
3.6×=
350÷68≈
2﹣30%= +25%= 4.23﹣23%= ×=
3+= 4×15%= = +50%=
①634﹣3.2×1.5÷0.1
②9.43+0.78﹣3.43
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