44.
Also works for 36, 63.
65
123: 1+2+3=6 1x2x3=6 Also 132, 213, 231,312 and 321
38
There is a complement that when added equals one but you may be thinking of multiplying. A number times its reciprocal (multiplicative inverse) is equal to one. A number added to its additive inverse (opposite) is equal to zero.
Yes. This is called the distributive property. For example: a(1 + 2 + 3 + ... + n) = 1a + 2a + 3a ... + na
19
The answer is 39. 3+9=12, 3x9=27. 12+27=39.
6
6
65
45
35
In a measurement the digits that are an approximation are only those in proper scientific notation. The more digits that are added to the number the more the number becomes exact.
38
123: 1+2+3=6 1x2x3=6 Also 132, 213, 231,312 and 321
192
47