2+3=5... 5x4=20... 20+1=21 !
To get to 28 using only the digits 2, 3, 4, and 5 once, you can use the following equation: (5 x 4) + (3 x 2) = 20 + 6 = 26. To reach 28, you can then add the remaining digit: 26 + 2 = 28.
20 = (3 + 2) x (4 x 1) = 5 x 4
two 20 dollar bills and one 5 dollar bill; two dimes and one penny
4 x 5 + 6 - 3!
factor: 15=3*5 20=2*2*5 35=5*7 so 5 is common to all only need it once LCM=5*3*2*2*7= 420
2 x 2 x 5 = 20 3 x 3 x 5 = 45 The GCF is 5.
(5+7)*(5-3)=12*2=24
101
4*5 + 6/3 = 20 + 2 = 22
4+3=5+2 or 4+5=32
There are not 20 ways - there are only 12.