okay so, Rebecca has 144 pansies altogether. If she planted 3 rows of 16 pansies you would have to multiply 16*3=48 Then she planted 4 rows of 14 pansies you would have to multiply 14*4=56 then add 48+56=104 then take that number and subtract it from your total (144 pansies) 144-104=40
She has 40 left over <---- That's your answer