①6a+13a=19a
②6x-28-2.5x+30.5
=6x-2.5x+30.5-28
=(6x-2.5x)+(30.5-28)
=3.5x+2.5
③8a-(5a+8)
=8a-5a-8
=3a-8
④5x+7-(4x+0.18)
=5x+7-4x-0.18
=5x-4x+7-0.18
=(5x-4x)+(7-0.18)
=x+6.82
化简 6a+13a 6x-28-2.5x+30.5 8a-(5a+8) 5x+7-(4x+0.18)
化简 6a+13a | 6x-28-2.5x+30.5 | 8a-(5a+8) | 5x+7-(4x+0.18) |
数学人气:194 ℃时间:2019-08-20 22:46:39
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