Question

calculati in doua moduri:
1. 2x(24+16);
2. (17-15)x4;
3. (20-13)x7;
4. (32-24):8;
5. 42+18):3;
6. 5x7x2x3;
7. 25x20x4x5;

Answer 1

2*24+2*16 sau 2*40
2*4 sau (17*4)-(15*4)
(20*7)-(13*7) sau 7*7
42/3+18/3 sau 60/3
35*6 sau 10*21
500*20 sau 100*100
la punctul 4 cred ca ai gresit ceva... :(

Answer 2

1.a. 2x40=80
   b. 2x24+2x16=48+32=80
2.a. 2x4=8
   b. 17x4-15x4=68-60=8
3.a. 7x7=49
   b. 20x7-13x7=140-91=49
4.a. 8:8=1
   b. 32:8-24:8=4-3=1
5.a. 60:3=20
   b. 42:3+18:3=14+6=20
6.a. (5x7)x(2x3)=35x6=210
   b.35x2x3=70x3=210
7.a. (25x20)x(4x5)=500x20=10000
   b. 500x4x5=2000x5=10000