(要写出过程,不要直接给答案,分部计算) 好的加悬赏!
9.8x2.5
=(10-0.2)x2.5
=10x2.5-0.2x2.5
=25-0.5
=24.5
1.25x64
=1.25x8x8
=10x8
=80
10.1x8.5
=(10+0.1)x8.5
=10x8.5+0.1x8.5
=85+0.85
=85.85
祝学习进步,望采纳~
=(10-0.2)x2.5
=10x2.5-0.2x2.5
=25-0.5
=24.5
1.25x64
=1.25x8x8
=10x8
=80
10.1x8.5
=(10+0.1)x8.5
=10x8.5+0.1x8.5
=85+0.85
=85.85
祝学习进步,望采纳~
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