Question

Afla numerele care lipsesc .
a) 1 x 8 + 1 =
12 x 8 + 2=
13 x 8 + 3 =

b) 1 x 9 + 2 =
12 x 9 + 3 =
123 x 9 + 4 =

c) 9 x 9 + =
98 x 9 + =
987 x 9 + =

Answer 1

1 x 8 + 1= 9
12 x 8 + 2= 30
13 x 8 +3= 107

Prima data se calculeaza operatiile de inmultire si impartire,si apoi adunarea.