0.49x99x0.49脱式计算怎么写?
2个回答
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解:0.49x99x0.49等于( 237699/10000 ),【即等于23.7699】
∵已知需求出0.49x99x0.49等于多少
∴0.49 x 99 x 0.49
= 0.49 × (100 - 1)× 0.49
= 49/100 × (100 - 1)× 0.49
= (49/100 × 100 - 49/100 × 1)× 49/100
= (49 - 49/100)× 49/100
= (4900/100 - 49/100)× 49/100
= 4851/100 × 49/100
= 237699/10000
= 23.7699
答:0.49x99x0.49等于237699/10000,【即等于23.7699】
∵已知需求出0.49x99x0.49等于多少
∴0.49 x 99 x 0.49
= 0.49 × (100 - 1)× 0.49
= 49/100 × (100 - 1)× 0.49
= (49/100 × 100 - 49/100 × 1)× 49/100
= (49 - 49/100)× 49/100
= (4900/100 - 49/100)× 49/100
= 4851/100 × 49/100
= 237699/10000
= 23.7699
答:0.49x99x0.49等于237699/10000,【即等于23.7699】
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