Question

1) 5-1,5-1-1/2=

2)tính bằng hai cách

72,54-(30,5+14,04)=

Answer 1

1)5-1,5-1-1/2=5-1,5-1-0,5=3,5-1-0,5=2,5-0,5=2

2)

C1: 72,54-(30,5+14,04)=72,54-44,54=28

C2:72,54-(30,5+14,04)=72,54-14,04-30,5+14,04=(72,54-14,04)+30,5=58,5-30,5=28