①4.7+16.48+5.3+3.52
②56.8-27.4-12.6
③8900÷25÷4
④138×56-56×38
⑤78×99+78
15.7+3.58+4.3+5.42 8×14×125 25+25×39 1680÷[(121-109)×4]
17.49+6.3= 20.6-16.8=
①67.73+39.67= ②★59-28.19=