怎样简便就怎样计算
2个回答
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9.05-2.6-3.4
=9.05-(2.6+3.4)
=9.5-6
=3.05
6.4+3.8+3.6
=6.4+3.6+3.8
=10+3.8
=13.8
2400➗12➗8
=2400➗8➗6➗2
=300➗6➗2
=50➗2
=25
(10+120➗3)x 8
=(10+40)x8
=50x 8
=400
=9.05-(2.6+3.4)
=9.5-6
=3.05
6.4+3.8+3.6
=6.4+3.6+3.8
=10+3.8
=13.8
2400➗12➗8
=2400➗8➗6➗2
=300➗6➗2
=50➗2
=25
(10+120➗3)x 8
=(10+40)x8
=50x 8
=400
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