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kuanysbajzuka
@kuanysbajzuka
October 2021
1
16
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92. Упростите выражение, используя свойства сложения:
1) (9 + а) +11;
3) (а + 17) + 23; 5) (18 + х) 4 12;
2) (16 + b) + 4;
4) (b + 22) + 18; 6) (43 + y) + 57.
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evvoronina1
1) (9 + а) +11 = (9 + 11) + а = 20 + а
2) (16 + b) + 4 = (16 + 4) + b = 20 + b
3) (а + 17) + 23 = a + ( 17 + 23) = a + 40
4) (b + 22) + 18 = b + (22 + 18) = b + 40
5) (18 + х) + 12 = 18 + 12 + x = 30 + x
6) (43 + y) + 57 = (43 + 57) + y = 100 + y
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Answers & Comments
2) (16 + b) + 4 = (16 + 4) + b = 20 + b
3) (а + 17) + 23 = a + ( 17 + 23) = a + 40
4) (b + 22) + 18 = b + (22 + 18) = b + 40
5) (18 + х) + 12 = 18 + 12 + x = 30 + x
6) (43 + y) + 57 = (43 + 57) + y = 100 + y