( 1 + 4 ) × 7 = 5 × 7 = 35
( 1 + a ) × 10 = 100
1 + a = 100 : 10
1 + a = 10
a = 10 - 1
a = 9 → completezi in cerculetul din stanga lui 100,
( 3 + 5 ) × 9 = 8 × 9 = 72 → completezi intre 3 si 5
( 0 + 6) × a = 48
6 × a = 48
a = 48 : 6
a = 8 → completezi in triunghi
