4.8÷1.2-0.48÷0.12有简便算法吗?
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解:4.8÷1.2-0.48÷0.12等于( 0 )
∵已知需求出4.8÷1.2-0.48÷0.12等于多少
X × Y - X × Z = X × (Y - Z)
∴4.8 ÷ 1.2 - 0.48 ÷ 0.12
= 4.8 ÷ (1×10+2)/10 - 0.48 ÷ 12/100
= 4.8 ÷ 12/10 - 0.48 ÷ 3/25
= 4.8 ÷ 6/5 - 0.48 × 25/3
= 4.8 × 5/6 - 0.48 × 25/3
= 0.48 × (10 × 5/6 - 25/3)
= 48/100 × (25/3 - 25/3)
= 12/25 × 0
= 0
答:4.8÷1.2-0.48÷0.12等于0
∵已知需求出4.8÷1.2-0.48÷0.12等于多少
X × Y - X × Z = X × (Y - Z)
∴4.8 ÷ 1.2 - 0.48 ÷ 0.12
= 4.8 ÷ (1×10+2)/10 - 0.48 ÷ 12/100
= 4.8 ÷ 12/10 - 0.48 ÷ 3/25
= 4.8 ÷ 6/5 - 0.48 × 25/3
= 4.8 × 5/6 - 0.48 × 25/3
= 0.48 × (10 × 5/6 - 25/3)
= 48/100 × (25/3 - 25/3)
= 12/25 × 0
= 0
答:4.8÷1.2-0.48÷0.12等于0
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