Помогите решить
1.
а) -4,3+1,6
б)-2 1/6-(-3)
в)7 5/8-9 1/4
г)-4,13-2,1
д)-1,5-(-0,3)+1,7
2.
а)х-4,7= -2,1 б) 1 5/6 -у=2 3/8
3.
1-2+3-4+5-6+7-8+9-10+11-12
4.
(-5 1/3+3 4/5)-(-2,8-0,8)
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