<span>Quin is adding the compensation needed instead of subtracting. First she calculated 40x4. She is trying to find 37x4. To do this, she would have to instead gather all the data:
3x4 = 12
40x4 = 160
Subtract instead of add:
40x4 - 3x4 = ?
160 - 12 = 148
The answer is 148.</span>
