(3/4 + -2/5)+ -7/10 =3/4+(-2/5+7/10)
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Step-by-step explanation:
3/4+(-2/5)+(-7/10)=3/4+(-2/5)+7/10
3+(-2) +(-7) = 3 +(-2) +7
4 5 10 4 5 10
LCM of 4,5,10=40
30+(-16)+(-28) = 30+(-16)+28
40 40
30+(-44) = 30+12
40 40
-14 = 42
40 40
-7 = 21
20 20
21 + 7
20 20
21 + 7
20
= 28 ( divide = 4)
20
= 7
5
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