3.48*0.77+0.97*6.52+0.996可以巧算么?
2020-07-19
展开全部
3.48*0.77+0.97*6.52+0.996
=3.48*0.77+(0.77+0.2)*6.52+0.996
=3.48*0.77+0.77*6.52+0.2*6.52+0.996
=0.77*(3.48+6.52)+(1.304+0.996)
=0.77*10+2.3
=7.7+2.3
=10
=3.48*0.77+(0.77+0.2)*6.52+0.996
=3.48*0.77+0.77*6.52+0.2*6.52+0.996
=0.77*(3.48+6.52)+(1.304+0.996)
=0.77*10+2.3
=7.7+2.3
=10
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