读一读,算一算,填正确答案的序号。
A.fifteen B. seventeen C. thirteen D.nineteen
E. eighteen F. fourteen G. sixteen
A.fifteen B. seventeen C. thirteen D.nineteen
E. eighteen F. fourteen G. sixteen
(1)8 + 9 =________
(2)25 - 9 =________
(3)6 + 7 =________
(4)45-30 =________
(5)13+5 =________
+错题本:0次