简算:17.4×2.43-1.43×7.4

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简算:17.4×2.43-1.43×7.4简算:17.4×2.43-1.43×7.4简算:17.4×2.43-1.43×7.417.4×2.43-1.43×7.4=10×2.43+7.4×2.43-1

简算:17.4×2.43-1.43×7.4
简算:17.4×2.43-1.43×7.4

简算:17.4×2.43-1.43×7.4
17.4×2.43-1.43×7.4
=10×2.43+7.4×2.43-1.43×7.4
=10×2.43+(2.43-1.43)×7.4
=24.3+7.4
=31.7