Question

如何用简便的方法计算37.8×8.17－71.7 ×3.78

Answer 1

37.8×8.17－71.7 ×3.78
=37.8×(8.17－7.17 )
=37.8×1
=37.8
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Answer 2

解答：
37.8×8.17－71.7 ×3.78
=3.78*（81.7-71.7）
=3.78*10=37.8

Answer 3

37.8×8.17－71.7 ×3.78
=37.8×(8.17－7.17 )
=37.8×1
=37.8

Answer 4

37.8*8.17-7.17*37.8=37.8(8.17-7.17)=37.8

Answer 5

37.8×8.17－71.7 ×3.78
=37.8×8.17－37.8 ×7.17
=37.8×(8.17- 7.17 ).
=37.8×1
=?