小学数学分数简算题目题目:100*5/98要求:用简便方法计算,不要硬算!?
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原式=(2+98)×5/98
=2×5/98+98×5/98
=5/49+5
=5又5/49.,10,100*5/98
=(98+2)*5/98
=(98*5+2*5)/98
=5+5/49
=5又5/49,2,100*5/98
=(98+2)*5/98
=98*5/98+2*5/98
=5+5/49
=5又49分之5,2,原式=(2+98)×5/98
=2×5/98+98×5/98
=5/49+5
=5又5/49.,2,250/49,0,100与5/98 两边都乘以98 9800/5,0,原式=(2+98)×5/98
=2×5/98+98×5/98
=5/49+5
=5又5/49.,0,
=2×5/98+98×5/98
=5/49+5
=5又5/49.,10,100*5/98
=(98+2)*5/98
=(98*5+2*5)/98
=5+5/49
=5又5/49,2,100*5/98
=(98+2)*5/98
=98*5/98+2*5/98
=5+5/49
=5又49分之5,2,原式=(2+98)×5/98
=2×5/98+98×5/98
=5/49+5
=5又5/49.,2,250/49,0,100与5/98 两边都乘以98 9800/5,0,原式=(2+98)×5/98
=2×5/98+98×5/98
=5/49+5
=5又5/49.,0,
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