0.25x4.8简便计算
3个回答
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解:0.25x4.8等于( 6/5 ),【即等于1.2】
∵已知需求出0.25x4.8等于多少
A × (B - C)= A × B - A × C
∴0.25 × 4.8
= 0.25 × (5 - 0.2)
= 0.25 × 5 - 0.25 × 0.2
= 25/100 × 5 - 25/100 × 2/10
= 5/4 - 1/20
= (5×5)/(4×5)- 1/20
= 25/20 - 1/20
= 24/20
= 6/5
= 1.2
答:0.25x4.8等于6/5,【即等于1.2】
∵已知需求出0.25x4.8等于多少
A × (B - C)= A × B - A × C
∴0.25 × 4.8
= 0.25 × (5 - 0.2)
= 0.25 × 5 - 0.25 × 0.2
= 25/100 × 5 - 25/100 × 2/10
= 5/4 - 1/20
= (5×5)/(4×5)- 1/20
= 25/20 - 1/20
= 24/20
= 6/5
= 1.2
答:0.25x4.8等于6/5,【即等于1.2】
展开全部
0.25×4.8
=0.25×4×1.2
=1 ×1.2
=1.2
或者
0.25×4.8
=0.25×(4+0.8)
=0.25 × 4+0.25 × 0.8
=1+0.2
=1.2
=0.25×4×1.2
=1 ×1.2
=1.2
或者
0.25×4.8
=0.25×(4+0.8)
=0.25 × 4+0.25 × 0.8
=1+0.2
=1.2
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展开全部
0.25变成1/4就可!
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