8t60kg=t
7.8+0.6= 3.97-0.5= 6.52+3.48= 0.568×100=
6-2.8= 4.5+3.8= 8.4-0.9= 23.9÷10=
①4.7+16.48+5.3+3.52
②56.8-27.4-12.6
③8900÷25÷4
④138×56-56×38
⑤78×99+78