如题所述
解:3.5的4.8倍比1.25多( 15.55 )
∵已知需求出3.5的4.8倍比1.25多多少
A的4.8倍 = A × 4.8 = A * 4.8 = 4.8A
3.5的4.8倍 = 3.5 × 4.8
= (3×10 + 5)/10 × (4×10 + 8)/10
= 35/10 × 48/10
= 7/2 × 24/5
= 84/5
= 16.8
∴3.5的4.8倍比1.25多的数 = 3.5 × 4.8 - 1.25
= 84/5 - (1×100 + 25)/100
= 84/5 - 125/100
= 84/5 - 5/4
= 336/20 - 25/20
= 311/20
= 15.55
答:3.5的4.8倍比1.25多15.55
∵已知需求出3.5的4.8倍比1.25多多少
A的4.8倍 = A × 4.8 = A * 4.8 = 4.8A
3.5的4.8倍 = 3.5 × 4.8
= (3×10 + 5)/10 × (4×10 + 8)/10
= 35/10 × 48/10
= 7/2 × 24/5
= 84/5
= 16.8
∴3.5的4.8倍比1.25多的数 = 3.5 × 4.8 - 1.25
= 84/5 - (1×100 + 25)/100
= 84/5 - 125/100
= 84/5 - 5/4
= 336/20 - 25/20
= 311/20
= 15.55
答:3.5的4.8倍比1.25多15.55
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