Question

вычислите 3/8+1/2+1 1/4 -( 1/28+5/7)

Answer 1

3/8+1/2+1 1/4-(1/28+5/7) 1/28+5/7 к общему знаменателю 1/28+20/28=21/28 3/8+1/2=3/8+4/8=7/8 7/8+1 1/4=7/8+5/4=7/8+10/8=17/8 17/8-21/28=119/56-42/56=77/56