例:
41+18=
26+42=
24+=68
+57=98
25+17=42
36+29=
说一说,用竖式计算两位数加法要注意什么?
= (根)
①28+54=
②70–25=
③49–25=
④72+17=
⑤36+57=
⑥65–47=
⑦68+29=
⑧92–46=
⑨72–57+16=
⑩36+54–29=