- = - = + = + = 3- =
53= + = = + - =
① - + -
②1- -
③ -( - )
④ + +
⑤19+ +
⑥ +( - )
①4.56-(1+0.4)×3.2
②73×1.61+1.61×28-1.61
③6.24×8×(0.47+0.25+0.53)
④38.4÷0.16-6.8×35+7.8
①(6.56×4.6-8.2-1.8)÷0.01
②6.8÷(25×0.34)
③10.1×8.8
④3.5×6.5+6.5×6.5
⑤78.6-1.8×(7-0.5)
⑥9.2÷2.5