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∵∠C=90°,AC=2.4cm,BC=1.5cm,∴S△ABC=12AC•BC=12×2.4×1.5=1.8cm2,∵CE是△ABC的中線,∴△AEC的面積=12S△ABC=12×1.8=0.9cm2.故答案為:0.9cm2.
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