5+5+5+5
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20 4 and 3
20
4 (4*3=12, 4*5=20)
The two numbers are 5 and 4. 5 x 4 = 20 5 + 4 = 9
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-4 x 5 = -20 and -4 + 5 = 1.
20 4 and 3
(22/4)x8-20=24
You can do just about anything if you use 4/4 as one of your addends.
20
3 and 9
I suppose you could write it as 20 and 4/4, but that doesn't make a lot of sense. In general, whole numbers and mixed numbers are separate things.
4 (4*3=12, 4*5=20)
The two numbers are 5 and 4. 5 x 4 = 20 5 + 4 = 9
4 × ((4 ÷ 4) + 4)=20
6 numbers can go into 20; they are 1, 2, 4, 5, 10 and 20.