问题
填空题
当□=2.1时,4×□-0.4=△,那么6(△+0.5)=______.
答案
将□=2.1代入4×□-0.4=△,
△=4×2.1-0.4,
=8.4-0.4,
=8,
则6(△+0.5),
=6×(8+0.5),
=6×8.5,
=51.
故答案为:51.
当□=2.1时,4×□-0.4=△,那么6(△+0.5)=______.
将□=2.1代入4×□-0.4=△,
△=4×2.1-0.4,
=8.4-0.4,
=8,
则6(△+0.5),
=6×(8+0.5),
=6×8.5,
=51.
故答案为:51.