(能简算的要简算) (4.8-3.6)*0.5+0.4

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(能简算的要简算) (4.8-3.6)*0.5+0.4
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(能简算的要简算) (4.8-3.6)*0.5+0.4
(能简算的要简算) (4.8-3.6)*0.5+0.4

(能简算的要简算) (4.8-3.6)*0.5+0.4
(4.8-3.6)*0.5+0.4
=1.2*0.5+0.4
=0.6+0.4
=1

(4.8-3.6)*0.5+0.4
=(4.8-3.6)*0.5+0.8*0.5
=(4.8+0.8-3.6)*0.5
=(5.6-3.6)*0.5
=2*0.5
=1