A sentença matemática abaixo apresenta a quantidade de figurinhas de dois amigos uma de cada lado da igualdade. Descubra o número que falta na sentença matemática e a idade dos irmãos: 18+? = 15+5 ? = 20

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

32/80  

91/140

the last one 54 doesn't go into 45. 54/100 ?

step-by-step explanation:

the 1st digit is in the 100s n its 1

step-by-step explanation:

3,589÷18 = 199.389

so the first digit of the quotient is in the 100s n its 1