Question

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求4跟5過程跟解答( ߹꒳​߹ )

(140 / 100² — — × 72²³²= = = 30/1 x 361
4④:100 X72章
= (300+12 (360+1)
=(08000+300+360+1
= 108661
6.9.9 × 10.2 = (10-0.1) (10 +0.1)
=100+1=2 -0.02
= 199.98
347x80+
39