imi trebuie până la ora 21:00
Răspunsuri la întrebare
Răspuns:
1. a) 46 - 23 = 23
56 - 16 = 40
29 - 14 = 15
b) 87 - 14 = 73
36 - 25 = 11
67 - 14 = 53
c) 79 - 30 = 49
58 - 27 = 31
96 - 95 = 1
2. a) a = 24; b = 21;
a - b = 24 - 21 = 3;
a + b = 24 + 21 = 45.
b) a = 32 + 32 = 64; b = 32
a - b = 64 - 32 = 32;
a + b = 64 + 32 = 96.
c) a = 47; b = 47 - 25 = 22;
a - b = 47 - 22 = 25;
a + b = 47 + 22 = 69.
d) a = 98 - 13 = 85; b = 13
a - b = 85 - 13 = 72;
a + b = 85 + 13 = 98.
e) a = 35; b = 12;
a - b = 35 - 12 = 23;
a + b = 35 + 12 = 47.
f) a = 76 - 20 = 56; b = 20;
a - b = 56 - 20 = 36;
a + b = 56 + 20 = 76.
g) a = 63; b = 30;
a - b = 63 - 30 = 33;
a + b = 63 + 30 = 93.
h) a = 14 + 11 = 25; b = 14;
a - b = 25 - 14 = 11;
a + b = 25 + 14 = 39.
3. 36 - 14 + 47 - 23 + 31
= 22 + 24 + 31
= 46 + 31 = 77
4. a) 56 - 42 = 14
b) 78 - 42 = 36
c) 95 - 42 = 53
d) 83 - 42 = 41
e) 62 - 42 = 20
5. x - 22 = 57
x = 57 + 22
x = 79
6. a) x - 51 = 43
x = 43 + 51
x = 94
27 - x = 14
-x = 14 - 27
-x = -13 / ×(-1)
x = 13
x - 82 = 17
x = 17 + 82
x = 99
b) x + 47 = 99
x = 99 - 47
x = 52
68 - x = 32
-x = 32 - 68
-x = -36 / ×(-1)
x = 36
85 + x = 98
x = 98 - 85
x = 13
c) x - 11 = 77
x = 77 + 11
x = 88
x + 21 = 82
x = 82 - 21
x = 61
49 - x = 32
-x = 32 - 49
-x = -17 / ×(-1)
x = 17
[sᴛʀᴘʜᴄʀɪᴢ09]
40
15
b) 73
11
53
c) 49
31
1
2)a-b= 24-21=3
a+b= 24+21=45
a-b= 32
a=64
a+b=64+32=96
a= 47
b=22
a-b=25
a+b= 47+25=72
a=85
b=13
a-b=85-13=72
a+b=85+13=98
a-b=35-12=23
a+b=35+12=47
a=56
b=20
a-b=56-20=36
a+b=56+20=76
a-b=63-30=33
a+b=63+30=93
a=25
b=14
a-b=25-14=11
a+b=25+14=39
3) 22+24+31=46+31=77
5) 79
6) a)94
13
99
Succes !