1)
8+12/2=14
12-14/2=5
a=5
2)
2*1+3*4=14
14/2*4=28
3)
7-4=3
-3=-3
−3 + 2 × (−(3)) = −9
4)
3 + 8 × 4 = 35
3+14=17
1+2=3
3+17=20
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Answers & Comments
1)
8+12/2=14
12-14/2=5
a=5
2)
2*1+3*4=14
14/2*4=28
3)
7-4=3
-3=-3
−3 + 2 × (−(3)) = −9
4)
3 + 8 × 4 = 35
3+14=17
1+2=3
3+17=20