addition
4 + 5 =
9
9-5=
4
4x5=
20
20÷5=
4
1+2+3=
a+b+c
7 + 6 =
13
13-7=
6
7x6=
42
42÷7=
6
4+5+6=
d+e+f
24 + 15 =
39
39-24=
15
24x15=
360
360÷24=
15
7+8+9=
g+h+i
58 + 23 =
81
81-53=
23
58x23=
1334
1334÷58=
23
10+11+12=
j+k+l
134 + 252 =
386
386-252=
134
134x252=
33768
33768÷252=
134
13+14+15=
m+n+o