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Ma ajutati la 2,3,4?Luati coroana


Ma Ajutati La 234Luati Coroana class=

Răspuns :

29-(9-3)
49-(9+8)
47-(7-7)
60-(5+5)


2. a) 29-(9-3)=29-6=23
b) 49-(9+8)=49-17=32
c) 47-(7-7)=7-0=47
d) 60-(5+5)=60-10=50

3. Adevarat. Numerele sunt: 10, 20, 30, 40, 50, 60, 70, 80, 90.

4. a) 23*7+23*3= 23*(7+3)=23*10= 230
sau
23*7+23*3=161+69=230
b) 51*16+51*84= 51*(16+84)=51*100=5100
sau
51*16+51*84= 816+4284=5100