Ընդհանուր հայտարար․ ամփոփում

$\dfrac78\times\dfrac{}{5}=\dfrac{}{\blueD{40}}$start fraction, 7, divided by, 8, end fraction, times, start fraction, divided by, 5, end fraction, equals, start fraction, divided by, start color #11accd, 40, end color #11accd, end fraction

$\dfrac3{10}\times\dfrac{}{4}=\dfrac{}{\blueD{40}}$start fraction, 3, divided by, 10, end fraction, times, start fraction, divided by, 4, end fraction, equals, start fraction, divided by, start color #11accd, 40, end color #11accd, end fraction

$\dfrac78\times\dfrac{5}{5}=\dfrac{35}{\blueD{40}}$start fraction, 7, divided by, 8, end fraction, times, start fraction, 5, divided by, 5, end fraction, equals, start fraction, 35, divided by, start color #11accd, 40, end color #11accd, end fraction

$\dfrac3{10}\times\dfrac{4}{4}=\dfrac{12}{\blueD{40}}$start fraction, 3, divided by, 10, end fraction, times, start fraction, 4, divided by, 4, end fraction, equals, start fraction, 12, divided by, start color #11accd, 40, end color #11accd, end fraction

$\dfrac78=\dfrac{35}{{40}}$start fraction, 7, divided by, 8, end fraction, equals, start fraction, 35, divided by, 40, end fraction

$\dfrac3{10}=\dfrac{12}{{40}}$start fraction, 3, divided by, 10, end fraction, equals, start fraction, 12, divided by, 40, end fraction