6.3+0.84+3.7+8.16 (简算)

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6.3+0.84+3.7+8.16 (简算)
6.3+0.84+3.7+8.16 (简算)

6.3+0.84+3.7+8.16 (简算)
(6.3+3.7)+(0.84+8.16)
=10+9
=19

6.3+3.7)+(8.16+0.84
=19

6.3+0.84+3.7+8.16= (6.3+3.7)+(0.84+8.16)=10+9=19

6.3+0.84+3.7+8.16
=(6.3+3.7)+(0.84+8.16)
=10+9
=19

(6.3+3.7)+(0.84+8.16)=19

6.3+0.84+3.7+8.16
=(6.3+3.7)+(0.84+8.16)
=10+9
=19

6.3+0.84+3.7+8.16= (6.3+3.7)+(0.84+8.16)=10+9=19

请问楼主 多大了?
是不是 脑残

6.3+0.84+3.7+8.16=(6.3+3.7)+(0.84+8.16)
=10+9
=19

6.3+0.84+3.7+8.16
=(6.3+3.7)+(0.84+8.16)
=10+9=19

6.3+0.84+3.7+8.16
=(6.3+3.7)+(0.84+8.16)
=10+9
=19