直接写出得数：36+79= 15÷1%= 9.1﹣1.9= 7.2÷0.6=0.25×8= ÷= ﹣= ×=1+30%= += 0.52= 9π=
+ =+ = = 改正：
直接写出得数．========
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= 0.52= 9π=
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