Multiply two fifths of the molecule by four. If the size of the fraction remains the same, what should be the denominator?
According to the basic nature of fractions, the denominator should also be multiplied by 4.
Approximate score: 45 15 =(45÷ 15) 1 = 15 3.
. 17 68=( 17÷ 17) 68 ÷ 17 = 4.
.230 divided by 50 = 230 in 50 = 23 in 5 = 4 and 5 molecules 3.
There is a box of sweets, less than 30 in total. If there is one left after counting four, and one left after counting seven, how many sweets are there in this box?
This box of sugar is more than the common multiples of 4 and 7 1.
The least common multiple of 4 and 7 is 4× 7 = 28.
This box of candy * * * has 28+ 1 = 29 (pieces)