6.8×2.7+6.8×0.72等于多少的简便运算?
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解:6.8×2.7+6.8×0.72等于( 2907/125 ),【即等于23.256】
∵已知需求出6.8×2.7+6.8×0.72等于多少
∴ 6.8 × 2.7 + 6.8 × 0.72
= 6.8 × (2.7 + 0.72)
= (6×10+8)/10 × [(2×10+7)/10 + 72/100]
= 68/10 × (27/10 + 72/100)
= 34/5 × (270/100 + 72/100)
= 34/5 × 342/100
= 34/5 × 171/50
= 2907/125
= 23.256
答:6.8×2.7+6.8×0.72等于2907/125,【即等于23.256】
∵已知需求出6.8×2.7+6.8×0.72等于多少
∴ 6.8 × 2.7 + 6.8 × 0.72
= 6.8 × (2.7 + 0.72)
= (6×10+8)/10 × [(2×10+7)/10 + 72/100]
= 68/10 × (27/10 + 72/100)
= 34/5 × (270/100 + 72/100)
= 34/5 × 342/100
= 34/5 × 171/50
= 2907/125
= 23.256
答:6.8×2.7+6.8×0.72等于2907/125,【即等于23.256】
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