In this lesson, we will learn how to use counting descendingly to subtract one-digit numbers.
Q1:
To find 7 take away 4, we can start at 7 and count backward 4.
Finish counting backward to find the answer to 7 take away 4.
Q2:
There were 9 balls in a box. Then, 5 of them were removed. How many balls are left?
Q3:
Count back to find 9−2.
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