65.4-4.29+24.6-5.71简便运算
问题描述:
65.4-4.29+24.6-5.71简便运算
答
65.4-4.29+24.6-5.71
=(65.4+24.6)-(4.29+5.71)
=90-10
=80
答
65.4-4.29+24.6-5.71
=65.4+24.6-(4.29+4.71)
=90-10
=80