Răspuns :
PROBLEMA1
97 - 56 +12+12+12=41+36=77
PROBLEMA 2
30+40=70; 100-70=30lei
100 - 30=70 - 40 =30 lei
EXERCITIUL 3
47 + 21 +31 - 29 - 70 = 0 100 - 40 -30 +15 - 45 = 0
EXERCITIUL 4
21 23 25
EXERCITIUL 5
24 +12 +12 =48
EXERCITIUL 6
primul termen:22
al doilea termen: 22+13=35
Suma lor 22 +35= 57
EXERCITIUL 7
43 +12=55
43-12=31
55-31=24
97 - 56 +12+12+12=41+36=77
PROBLEMA 2
30+40=70; 100-70=30lei
100 - 30=70 - 40 =30 lei
EXERCITIUL 3
47 + 21 +31 - 29 - 70 = 0 100 - 40 -30 +15 - 45 = 0
EXERCITIUL 4
21 23 25
EXERCITIUL 5
24 +12 +12 =48
EXERCITIUL 6
primul termen:22
al doilea termen: 22+13=35
Suma lor 22 +35= 57
EXERCITIUL 7
43 +12=55
43-12=31
55-31=24
EXERCITIUL 1
97-56+(12+12+12)
97-56+(24+12)
97-56+36
41+36
77
PROBLEMA 2
30+40=70; 100-70=30
100-30=70;70-40=30
EXERCITIUL 3
47+21+31-29-70
68+31-29-70
99-29-70
70-70
0
100-40-30+15-45
60-30+15-45
30+15-45
45-45
0
EXERCITIUL 4
21,23.25
EXERCITIUL 5
A=12+12+24
A=24+24
A=48
EXERCITIUL 6
T1=22
T2=T1+13
T2=22+13
T2=35
T1+T2=S
22+35=57
EXERCITIUL 7
(43+12)-(43-12)=
55-31=
24
97-56+(12+12+12)
97-56+(24+12)
97-56+36
41+36
77
PROBLEMA 2
30+40=70; 100-70=30
100-30=70;70-40=30
EXERCITIUL 3
47+21+31-29-70
68+31-29-70
99-29-70
70-70
0
100-40-30+15-45
60-30+15-45
30+15-45
45-45
0
EXERCITIUL 4
21,23.25
EXERCITIUL 5
A=12+12+24
A=24+24
A=48
EXERCITIUL 6
T1=22
T2=T1+13
T2=22+13
T2=35
T1+T2=S
22+35=57
EXERCITIUL 7
(43+12)-(43-12)=
55-31=
24