145
Question
Emma had 3 weeks to sell cookies for her game. She sold 99 cookies in the first week. In the second week she sold 111 cookies and in the third week she sold 90 cookies. What was the total number of cookies she sold?
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Solution
Cookies sold in the first week = 99
Cookies sold in the second week = 111
Cookies sold in the third week = 90
Total number of cookies sold = 99 + 111 + 90
Using associative rule of addition, we get
= (99 + 111) + 90
= 210 + 90
= 300
Hence, 300 cookies were sold in all.
Cookies sold in the first week = 99
Cookies sold in the second week = 111
Cookies sold in the third week = 90
Total number of cookies sold = 99 + 111 + 90
Using associative rule of addition, we get
= (99 + 111) + 90
= 210 + 90
= 300
Hence, 300 cookies were sold in all.
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