1.7*57+5.1*81怎么简算?
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1.7*57+5.1*81怎么简算?
1.7*57+5.1*81怎么简算?
1.7*57+5.1*81怎么简算?
1.7*57+5.1*81
=1.7x3x19+5.1*81
=5.1x(19+81)
=5.1x100
=510
1.7*57+5.1*81怎么简算?
1.7*57+5.1*81怎么简算?
1.7*57+5.1*81怎么简算?
1.7*57+5.1*81
=1.7x3x19+5.1*81
=5.1x(19+81)
=5.1x100
=510