40 of 20 = 40 x 20 = 800 40% of 20 = 0.4 x 20 = 8
40*52 = 2,080. If you need to calculate this in your head, an easy way is to first multiply 52 by 4 instead of 40. That will give you an answer of 208. Then you can multiply by 10 to get 2,080.
1*40 2*20 5*8
20 * 2 = 40
1 x 40 = 40 2 x 20 = 40 4 x 10 = 40 5 x 8 = 40
40%=52 20%=52 / 2=27 100%=27 x 5=135 so the answer is 135
52 x 40 = 2080
52 = 1.3x x = 52/1.3 x = 40
40 of 20 = 40 x 20 = 800 40% of 20 = 0.4 x 20 = 8
6x-52 = 4x+40 6x-4x = 40+52 2x = 92 Answer: x = 46
130/100 = 130% = 1.30 1.30 x 40 = 52
1 x 1040, 2 x 520, 4 x 260, 5 x 208, 8 x 130, 10 x 104, 13 x 80, 16 x 65, 20 x 52, 26 x 40 = 1040
1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
((20,000,000 x 52) x 20) / 1,700,000 = 12,235
-18
20$ 80c
1800 25 = 52 40 = 23 x 5 45 = 32 x 5 lcm = 23 x 32 x 52 = 1800