0.521X13.4+5.21╳0.66要简便运算?
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解:0.521X13.4+5.21╳0.66等于( 521/50 ),【即等于10.42】
∵已知需求出0.521X13.4+5.21╳0.66等于多少
A × B + A × C = A × (B + C)
∴0.521 X 13.4 + 5.21 ╳ 0.66
= 0.521 × (13.4 + 10 × 0.66)
= 521/1000 × [(13×10+4)/10 + 10 × 66/100]
= 521/1000 × (134/10 + 10 × 33/50)
= 521/1000 × (67/5 + 33/5)
= 521/1000 × 100/5
= 521/50
= 10.42
答:0.521X13.4+5.21╳0.66等于521/50,【即等于10.42】
∵已知需求出0.521X13.4+5.21╳0.66等于多少
A × B + A × C = A × (B + C)
∴0.521 X 13.4 + 5.21 ╳ 0.66
= 0.521 × (13.4 + 10 × 0.66)
= 521/1000 × [(13×10+4)/10 + 10 × 66/100]
= 521/1000 × (134/10 + 10 × 33/50)
= 521/1000 × (67/5 + 33/5)
= 521/1000 × 100/5
= 521/50
= 10.42
答:0.521X13.4+5.21╳0.66等于521/50,【即等于10.42】
2019-11-14 · 知道合伙人教育行家
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0.521╳13.4+5.21╳0.66
=0.521X13.4+0.521╳6.6
=0.521╳(13.4+6.6)
=0.521╳20
=10.42
=0.521X13.4+0.521╳6.6
=0.521╳(13.4+6.6)
=0.521╳20
=10.42
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