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設可燒x噸15x=2.5×1215x=30x =30÷15x=22.5-2=0.5噸答:……24×(1-3分之1-2分之1)=4米答:……(39+40+41+3×2)×8=1008人答:……(600-98)×250=12550千克答:……9.7-4.8=4.9元答;:……5.9×29=171.1元答:…
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