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2.8×5.6列竖式.

100×5.6=560

0.13

8.29/5.6≈1.48 竖式如下:

5.6*0.25 = 1.4

除不尽

5.6 × 6.5125 = 36.47 竖式见图:

=1.25✘0.8✘7 =1✘7 =7 就是 5.6=0.8✘7

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