最大公因数: 最小公倍数:
120平方米=公顷 72分=时 300克=千克
30=+ 30=+
①4.3-1.6=
②0.74+ =
③2 - =
④2-1 =
⑤5 +7=
⑥0.375+1 =
⑦5 -1 -1 =
⑧ +0.5+0.5- =
① + -
② -( + )
③ -( - )
④ + + +
① x - 0.2x =6.4
②12- 2x =8
③ x- + =1