1. -3 + 2 - 1 + 3 1
4 5 20 2
-3 + 2 -1 + 7 = -15 + 8 - 1 + 70 = 78 -16 = 62 = 31
4x 5x 20x 2x 20 20 20 20 20 20 20 10
5 4 1 10
4 5 20/ 2 2
2 5 10/2 2x5=20
1 5 5/5
1 1 1/
2. +4 -1 +3 -5 +8 = +16 - 2 +48 -40 +8 = +72 - 42 = 30 = 15
8x 16x 2x 4x 32x 32 32 32 32 32 32 32 32 16
8 16 2 4 32/2
4 8 1 2 16/2
2 4 1 1 8/ 2 2x2x2x2x2x= 32
1 2 1 1 4/2
1 1 1 1 2/2
1 1 1 1 1/
3. +5 -2 + 1 - 1 2 - 4 2=
30 15 2 5 3
5 -2 + 1 - 7 - 14 + 5 - 4 + 15 - 42 -140 =-20 -186 = 166 = 83
30x 15x 2x 5x 3x 30 30 30 30 30 30 30 30 15
1 2 15 6 10
30 15 2 2 3/2
15 15 1 1 3/5 2x5x3=30
3 3 1 1 3/3
1 1 1 1 1/
4. -14 + 1 + 2 + 6 =-280 + 3 + 8 + 180 =+ 191 - 280 =- 99 =- 33
3x 20x 15x 2x 60 60 60 60 60 60 60 20
20 3 4 30
3 20 15 2/2
3 10 15 1/2
3 5 3 1/3 R=/ 60
1 5 1 1/5
1 1 1 1/1
5. 1 1 - 11 + 9 - 5
7 14 42 2
8 - 11 + 9 - 5 = 48 - 33 + 9 - 105 = +57 -138= -81 = 27
7 14 42 2 42 42 42 42 42 42 42 14
7 14 42 2/2
7 7 21 1/3 2x3x7=42
7 7 7 1/7
1 1 1 1/
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