+ = - = - = 7÷8+ =
+0.8= 12÷18= 1- - = - + =
⑴
⑵
⑶
⑷
⑸
⑹
⑺
⑻
①4.3-1.6=
②0.74+ =
③2 - =
④2-1 =
⑤5 +7=
⑥0.375+1 =
⑦5 -1 -1 =
⑧ +0.5+0.5- =