Question

Tính:

a) 235 + 78 - 142;

b) 14 + 2.8²;

c) {2³ + (1 + (3 – 1)²]}: 13.

Answer 1

a) 235 + 78 - 142 = 171

b) 14 + 2 . 8² = 14 + 2 . 64 = 142

c) {2³ + [1 + (3 − 1)²]}:13 =[8 + (1 +2² )] : 13= [8 + (1 + 4)] : 13 = 13 : 13 = 1

Answer 2

a) 235 + 78 - 142

=313-142

=171

b) 14 + 2.8²

=14+2.64

=14+128

=142

c) {2³ + (1 + (3 – 1)²]}: 13.

=[8+5]:13

=13:13

=1