Ответ:
1)1/3 + 1/6= 2/6+1/6=3/6=1/2
3/11-1/13=50/143
3 1/30-5 7/90=3 3/90- 5 7/90 = -2 4/90
2)8.31-(4.29+3.721)= 0.299
3)7/16×8/21=1/6
(-3 1/4)×(3 9/13)= -12
-4/5 : 9= -4/45
5)11²=121
(-5)³=-625
(-1 1/5)²= 1 11/25
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Answers & Comments
Ответ:
1)1/3 + 1/6= 2/6+1/6=3/6=1/2
3/11-1/13=50/143
3 1/30-5 7/90=3 3/90- 5 7/90 = -2 4/90
2)8.31-(4.29+3.721)= 0.299
3)7/16×8/21=1/6
(-3 1/4)×(3 9/13)= -12
-4/5 : 9= -4/45
5)11²=121
(-5)³=-625
(-1 1/5)²= 1 11/25