Bài 3:
a: C1: \(\left(36+24\right):0,6=60:0,6=100\)
C2: \(\left(36+24\right):0,6=36:0,6+24:0,6=60+40=100\)
b:
Cách 1: \(\left(99-66\right):0,33=33:0,33=100\)
Cách 2: \(\left(99-66\right):0,33\)
\(=99:0,33-66:0,33\)
=300-200
=100
Câu 2:
\(15,26:0,25=15,26:\dfrac{1}{4}=15,26\cdot4=61,04\)
\(978,3:0,125=978,3\cdot8=7826,4\)
\(412:0,25=412\cdot4=1648\)
\(64,32:0,125=64,32\cdot8=514,56\)