②3.4L=mL
③5立方米=立方分米
④6.8千克=克
①150+500=
②1.2+2.3=
③240-200=
④4.85-3.15=
⑤
⑥
⑦5.4÷0.9=
⑧2.5×0.4=
①976+829+24
②42÷()
③13.2×0.44+13.2×0.56
①4x- 2.7= 22.1
②36:0.4=x:
③8x÷7= 280