Ответ учителя по предмету Математика
1)5 1/30-2 3/5=3 1/30-18/30=2 31-18/30=2 13/30
2)2 13/30-2/15=2 13/30-4/30=2 9/30=2 3/10
3)2 3/10+6=8 3/10
4)7-6 11/12=6 12/12-6 11/12=1/12
5)1/12 +1/4=1/12+3/12=4/12=1/3
6)8 3/10-1/3=8 9/30-10/30=7 39/30-10/30=7 29/30
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