1997个6+1996个6 简便计算

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1997个6+1996个6 简便计算
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1997个6+1996个6 简便计算
1997个6+1996个6 简便计算

1997个6+1996个6 简便计算
1997*6+1996*6
=6*(1997+1996)
=6*(4000-7)
=24000-42
=23958

1997*6 + 1996*7
= (2000-3)*6 + (2000-4)*7
=12000 - 18 + 14000 - 28
= 26000 - 46
= 25954

1997*6 + 1996*7
= (2000-3)*6 + (2000-4)*7
=12000 - 18 + 14000 - 28
= 26000 - 46
= 25954