Variations of Comparison Model - "More Than"

Step 1: Draw a box and write the number found after the word "than" in this box.




Step 2: Draw a dot at the top-right corner of the first box. This marks the starting point of the arrow we are about to draw next.




Step 3: Draw an arrow from the dot pointing to the right. (The arrow points to the right because it is a "more than" question.




Step 4: Since it is "more than", we are actually making the number 17 (starting number) greater by 4. Hence, draw a second box directly below the arrow to show that the number 17 has been lengthened by 4.




Step 5: Draw a last box to match the length of the first two boxes and write the unknown value "?" in this box.




From the model,

17 + 4 = ?
17 + 4 = 21

Thus, the answer is 21.


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