doubles 1 apart-fri-gr.4
DESCRIPTION
3 second recall facts for addition- doubles and 1 apart for gr. 4TRANSCRIPT
Mental Math Strategy:
Addition Doubles-1 ApartGr. 4
80 + 70 =
30 + 30 =
50 + 60 =
90 + 90 =
40 + 50 =
10 + 10 =
30 + 40 =
60 + 70 =
80 + 80 =
40 + 40 =
70 + 80 =
20 + 30 =
90 + 80 =
60 + 60 =
50 + 40 =
50 + 50 =
70 + 60 =
80 + 90 =
20 + 20 =
60 + 50 =
40 + 30 =
70 + 70 =
30 + 20 =
