Ответ:
Пошаговое объяснение:
1.
1) 12 + (-20) = 12 - 20 = -8
2) -8 - (-11) = -8 + 11 = 3
3) 3 - (-6) = 3 + 6 = 9
4) 9 - 10 = -1
2.
1) 3. 5/12 - (-1. 1/3) = 3. 5/12 + 1. 1/3 =
3. 5/12 + 1. 4/12 = 4. 9/12 = 4. 3/4
2) 4. 3/4 + (-4. 3/5) = 4. 3/4 - 4. 3/5 =
4. 15/20 - 4. 12/20 = 3/20
3.
(-13,24 + 8,24) + (4,9 + (-4,9)) + в =
-5 + (4,9 - 4,9) + в =
-5 + 0 + в = -5 + в
в = 34/9 = 3. 7/9
-5 + в = -5 + 3. 7/9 = -4. 9/9 + 3. 7/9 =
-1. 2/9
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Answers & Comments
Ответ:
Пошаговое объяснение:
1.
1) 12 + (-20) = 12 - 20 = -8
2) -8 - (-11) = -8 + 11 = 3
3) 3 - (-6) = 3 + 6 = 9
4) 9 - 10 = -1
2.
1) 3. 5/12 - (-1. 1/3) = 3. 5/12 + 1. 1/3 =
3. 5/12 + 1. 4/12 = 4. 9/12 = 4. 3/4
2) 4. 3/4 + (-4. 3/5) = 4. 3/4 - 4. 3/5 =
4. 15/20 - 4. 12/20 = 3/20
3.
(-13,24 + 8,24) + (4,9 + (-4,9)) + в =
-5 + (4,9 - 4,9) + в =
-5 + 0 + в = -5 + в
в = 34/9 = 3. 7/9
-5 + в = -5 + 3. 7/9 = -4. 9/9 + 3. 7/9 =
-1. 2/9