Question

将下列各式写成省略加号的和的形式,并合理交换加数的位置 (-2.6)-(-4.7)-（+0.5）+（+2.4）+（-3分

Answer 1

(-2.6)-(-4.7)-（+0.5）+（+2.4）+（-3)

=-2.6+4.7-0.5+2.4-3

=(4.7+2.4)-(2.6+0.5+3)

=7.1-6.1

=1