①10.1×(4×25) ②(40.4﹣0.4)×25 ③40×25+0.4×25 ④1.01×(0.4×25)
①0.3×4= ②3.3÷3= ③2.4×5= ④a+a= ⑤2.1÷0.07=
⑥8.2×0.01= ⑦4÷5= ⑧6.2+2.8= ⑨0.45÷9= ⑩3.06÷3=
①8.4÷1.2﹣1.8
②7.83÷0.8÷1.25
③18.9÷(9×0.6)
④9.27+3.5×6
⑤4.89×99+4.89
⑥32×(37.6﹣28.5)÷1.6