解:2.53+4.62x2.53等于( 71093/5000 ),【即等于14.2186】
∵已知需求出2.53+4.62x2.53等于多少
X × Y + X × Z = X × (Y + Z)
∴2.53 + 4.62 x 2.53
= 2.53 × (1 + 4.62)
= (2×100+53)/100 × [1 + (4×100+62)/100 ]
= 253/100 × (1 + 462/100)
= 253/100 × (100/100 + 462/100)
= 253/100 × 562/100
= 253/100 × 281/50
= 71093/5000
= 14.2186
答:2.53+4.62x2.53等于71093/5000,【即等于14.2186】
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