1.28×2.37—2.8×0.237
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1.28×2.37—2.8×0.2371.28×2.37—2.8×0.2371.28×2.37—2.8×0.2371.28×2.37—2.8×0.237=1.28×2.37-0.28×2.37=(1.
1.28×2.37—2.8×0.237
1.28×2.37—2.8×0.237
1.28×2.37—2.8×0.237
1.28×2.37—2.8×0.237
=1.28×2.37 - 0.28×2.37
=(1.28-0.28)×2.37
=1×2.37
=2.37
1.28×2.37—2.8×0.237=2.37
1.28×2.37—2.8×0.237=2.37×(1.28-0.28)=2.37
1.28×2.37—2.8×0.237=(1.28-0.28)*2.37
=2.37
1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37
=(1.28-0.28)×2.37
=1×2.37
=2.37
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1.28×2.37—2.8×0.237
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