Question

rezolva in doua moduri prin asociere

38×15×5
124×8×9
1236×4×5
12.487×6×2​

Answer 1

1).. ( 38×15)×5=570×5=2850

38×(15×5)=38×75=2850

2). ( 124×8)×9=992×9=8928

124×(8×9)=124×72=8928

3). ( 1236×4)×5=4944×5=24.720

1236×(4×5)=1236×20=24.720

4). ( 12.487×6)×2=74.922×2=149.844

12.487×(6×2)= 12.487×12=149.844