计算:(55/9−0.8+24/9)×(7.6÷4/5+22/5×1.25)=_.

问题描述:

计算:(5

5
9
−0.8+2
4
9
)×(7.6÷
4
5
+2
2
5
×1.25)=______.

(5

5
9
−0.8+2
4
9
)×(7.6÷
4
5
+2
2
5
×1.25)
=[(5
5
9
+2
4
9
)−0.8]×(7
3
5
×
5
4
+2
2
5
×
5
4
)

=(8−0.8)×
5
4
×(7
3
5
+2
2
5
)

=7.2×
5
4
×10

=72×
5
4

=90;
故答案为:90.