I usually start from the bottom - is 2 a factor, yes indeed. Then start over. Is 2 a factor, yes. Start over. Is 2 a factor, yes. Is 2 a factor, no. Is 3 a factor, no. is 4 a factor, no. Done.
2, 2, 2, 5
because if you divide 40 by 1,2,4,and5 you will get the answer (and what about 8, 10, 20, and 40 ? are they nothing but chopped liver ?)
40 has four factor pairs:40 = 1 x 4040 = 2 x 2040 = 4 x 1040 = 5 x 8
1x40 2x20 4x10 5x8
Looking at factor pairs of 40: {1*40, 2*20, 4*10, 5*8}, 4 & 10 should work:To get -40 one of them must be negative: -10*4 = -40, and -10 + 4 = -6
(120,1)(60,2)(40,3)(30,4)(24,5)(20,6)(15,8)(12,10)
1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.
Explaining how to find all factors pairs of 40 is easy. All you have to do is find which whole numbers 40 can be divided into.
Between 35 and 40, 36 has the most factor pairs.
because if you divide 40 by 1,2,4,and5 you will get the answer (and what about 8, 10, 20, and 40 ? are they nothing but chopped liver ?)
Divide by two. 40 and 1 20 and 2 10 and 4 5 and 8
Divide by two. 40 and 1 20 and 2 10 and 4 5 and 8
The rules of divisibility tell you that 40 is divisible by 1, 2, 4 and 5. Dividing 40 by those numbers gives you 40, 20, 10 and 8. Writing them together gives you the factor pairs of 40. (40,1)(20,2)(10,4)(8,5)
Divide by two. 40 and 1 20 and 2 10 and 4 5 and 8
Keep dividing by 2 40,1 20,2 10,4 5,8
algebra
To find the pairs of whole numbers that multiply to equal 40, we can identify the factor pairs of 40. The pairs are (1, 40), (2, 20), (4, 10), and (5, 8). Including the reverse pairs, there are a total of 8 pairs: (1, 40), (40, 1), (2, 20), (20, 2), (4, 10), (10, 4), (5, 8), and (8, 5). Thus, there are 8 pairs of whole numbers that equal 40.
From the rules of divisibility, we know that 40 is divisible by 1, 2, 4 and 5. Divide those numbers into 40 to get the rest. (40,1)(20,2)(10,4)(8,5)