(0.97+0.97*2+0.97)*2.5(简算)

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(0.97+0.97*2+0.97)*2.5(简算)
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(0.97+0.97*2+0.97)*2.5(简算)
(0.97+0.97*2+0.97)*2.5(简算)

(0.97+0.97*2+0.97)*2.5(简算)
(0.97+0.97*2+0.97)*2.5
=(0.97*4)*2.5
=0.97*(4*2.5)
=0.97*10
=9.7

(0.97+0.97*2+0.97)*2.5
=0.97×4×2.5
=0.97×10
=9.7

0.97*4*2.5=9.7

0.97*4*2.5(10/4)