65.4-4.29+24.6-5.71简便运算
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65.4-4.29+24.6-5.71简便运算65.4-4.29+24.6-5.71简便运算65.4-4.29+24.6-5.71简便运算65.4-4.29+24.6-5.71=65.4+24.6-(
65.4-4.29+24.6-5.71简便运算
65.4-4.29+24.6-5.71简便运算
65.4-4.29+24.6-5.71简便运算
65.4-4.29+24.6-5.71
=65.4+24.6-(4.29+4.71)
=90-10
=80
65.4-4.29+24.6-5.71
=(65.4+24.6)-(4.29+5.71)
=90-10
=80
65.4-4.29+24.6-5.71简便运算
3.8-4.29 +4.2-2.71的简算
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