90, 180, 270, 360, 450
10
20
The GCF of 30 and 20 is 10. The GCF of 40 and 20 is 20.
5: 5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,105,110.10: 10,20,30,40,50,60,70,80,90,100,110,120,130,140,150,160,170,180,190.
These may help you answer your questions: 1, 2, 4, 5, 8, 10, 20 and 40.
|-20 - (-40)| = 20 |-20 - 10| = 30 -20 is closer to -40 than 10.
40 (+20, -10, +30 ,-20)
50 + 40 + 40 + 40 + 30 + 30 + 20 + 10 = 260
90, 180, 270, 360, 450
Greatest common factor of 20 30 and 40 is 10.
Take your pick; 10 and 20, 10 and 30, 10 and 40, 10 and 50, 10 and 60, 10 and 70, 10 and 80, 10 and 90, 20 and 30, 20 and 50, 20 and 70, 20 and 90, 30 and 40, 30 and 50, 30 and 70, 30 and 80, 40 and 50, 40 and 70, 40 and 90, 50 and 60, 50 and 70, 50 and 80 50 and 90, 60 and 70, 70 and 80, 70 and 90, 80 and 90.
10 and any multiple of 10 (20, 30, 40, etc) 20 and 30, 40 and 90, 60 and 70
5w - 20 -40 ...... -105w - 30 -40 ...... -105w - 40 -40 ...... +205w - 50 -40 ...... +10/+2010w - 30 -30/-20 ...... +4010w - 40 -30 ...... +5010w - 50 -30 ...... +5015w - 40 -22/-15 ...... +5015w - 50 -22 ...... +5020w - 40 -10 ...... +5020w - 50 -10 ...... +50
5w - 20 -40 ...... -105w - 30 -40 ...... -105w - 40 -40 ...... +205w - 50 -40 ...... +10/+2010w - 30 -30/-20 ...... +4010w - 40 -30 ...... +5010w - 50 -30 ...... +5015w - 40 -22/-15 ...... +5015w - 50 -22 ...... +5020w - 40 -10 ...... +5020w - 50 -10 ...... +50
10, 20, 30, 40, 50, 60, and so on 10, 20, 30, 40, 50 The first ten multiples of ten are 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100. 10,20,30,40,50,60,70,80,90,100,110,120,130,140,150,160,170,180,190.........................……and keep on adding 10.
40