Question

Calculeaza in două moduri: a) (7+21):7= (32 +24):8= b) (60 - 6): 6 = (72 - 54):9= c) (15 + 25 + 10): 5 = (20 - 18+14):2 =​

Answer 1

Răspuns:

a)

(7+21):7=28:7=4

(7:7)+(21:7)=1+3=4

(32 +24):8= 56:8=7

(32:8)+(24:8)=4+3=7

b)

(60 - 6): 6 =54:6=9

(60:6)-(6:6)=10-1=9

(72 - 54):9=18:9=2

(72:9)-(54:9)=8-6=2

c)

(15 + 25 + 10): 5 =50:5=10

(15:5)+(25:5)+(10:5)=3+5+2=10

(20 - 18+14):2 =16:2=8

(20:2)-(18:2)+(14:2)=10-9+7=8

Answer 2

$\it a)\ (7+21):7=28:7=4\\ \\ (7+21):7=7:7+21:7=1+3=4\\ \\ \\ (32+24):8=32:8+24:8=4+3=7\\ \\ (32+24):8=56:8=7\\ \\ \\ c)\ (15+25+10):5=50:5=10\\ \\ (15+25+10):5=15:5+25:5+10:5=3+5+2=10$