问题 解答题

怎样算简便就怎样算.

4.32+5.43+6.68

15.17-6.8-3.2

12.75-(2.75+6.8)

答案

4.32+5.43+6.68

=4.32+6.68+5.43

=11+5.43

=16.43

15.17-6.8-3.2

=15.17-(6.8+3.2)

=15.17-10

=5.17

12.75-(2.75+6.8)

=12.75-2.75-6.8

=10-6.8

=3.2

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