王老师买4个篮球，付160元，找回8元．他买的是哪种篮球？（用方程解）
找准对应．（12）
×15=÷=÷50%= 8×25%=×0×=﹣= 0.5+=×=÷3=（﹣）×30=
16÷0.25====== 1﹣= 2.25+×=====
直接写得数×8=×= 81÷=÷= 63÷=÷=××= 3×÷3×= 36×25%=（﹣）×24=
直接写出得数： 25×= 1.8×=÷=÷3=﹣=﹣=（+）×30=÷×=．
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×15=
÷
=
÷50%= 8×25%=
×0×
=
﹣
= 0.5+
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×
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