When two fractions have the same denominators then it is very easy to subtract these fractions. Just subtract the numerators and keep the common denominator same for the answer. For grade 4 math these problems stay at very basic levels as these kids just need an introduction to basic subtraction of fractions.
Below are the activity sheets I prepared to learn and practice the concept;
https://steemitimages.com/0x0/https://ipfs.busy.org/ipfs/QmTd4Nm4BmxHLbTtfjzdhyCxMqbH5AdFqUuBtuUH6KuFLo
