Điền vào chỗ chấm: a) (154 × 32) × 15 = 15 × 32 × … b) a × b × c = b × (… × a)
Giải thích
a) (154 × 32) × 15 = 15 × 32 × 154
b) a × b × c = b × (c × a)
c) (36 × 19) × 45 = 19 × 45 × 36
d) 10 × 24 × 38 = (38 × 10) × 24
e) 49 × (57 × 28) = 57 × 28 × 49
f) m × n × o = o × m × n