Question

Efectueaza apoi verifica prin adunare. 35+34=□□; □□+□□=□□; 42+31=□□; □□+□□=□□; 59-24=□□; □□+□□=□□; 75-32=□□; □□+□□=□□; 43+42=□□; □□+□□=□□; 35+20=□□; □□+□□=□□;

Answer 1

Explicație pas cu pas:

35+34=69

prin adunare:34+35=69

42+31=73

prin adunare:31+42=73

59-24=35

prin adunare:35+24=59

75-32=43

prin adunare:43+32=75

43+42=85

prin adunare:42+43=85

35+20=54

prin adunare:20+35=54