Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
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Q 1/4
Score 0
Find a related addition fact for
9 + 8 = 17
60
9 - 8 = 1
7 + 8 = 15
8 + 9 = 17
Q 2/4
Score 0
Find a related addition fact for 16 - 7 = ?
60
6 + 10 = 16
7 + 9 = 16
4 questions
Q.
Find a related addition fact for
9 + 8 = 17
1
60 sec
1.OA.C.6
Q.
Find a related addition fact for 16 - 7 = ?
2
60 sec
1.OA.C.6
Q.
Yazan is colouring all RELATED FACTS RED. Which number sentences will he colour.
