25立方分米=立方厘米 36分=时
- = + = 9.3-6.87= 12.5×8= 8-( + )=
3+ = 4- = - = -0.375= 3.68+ -0.68=
① +0.25+ +1.75
② + -
③ -( - )
④4- -
⑤ ×3.6+ ×3.6
⑥6.45- -0.45