a),27x36+27x4+54x30
= 27x36+27x4+27x60
= 27x(36+4+60)
= 27x100 = 2700
b)125x25x5x8x2x4
= 125x8x25x4x2x5
=1000x100x10
= 1000000
c)125x37x32:4
= 125x8x37x4:4
= 1000x37
= 37000
\(a,27\cdot36+27\cdot4+54\cdot30=27\cdot36+27\cdot4+27\cdot60\)
\(=27\cdot\left(36+4+60\right)=27\cdot100=2700\)
\(b,125\cdot25\cdot5\cdot8\cdot2\cdot4=25\cdot4\cdot25\cdot5\cdot2\cdot4\cdot2\cdot4\)
\(=25\cdot25\cdot25\cdot4\cdot4\cdot4=100\cdot100\cdot100=1000000\)
\(c,125\cdot37\cdot32:4=125\cdot37\cdot8\)
\(=1000\cdot37=37000\)
. là nhân nha
a) 27 × 36 + 27 × 4 + 54 × 30
= 27 × 36 + 27 × 4 + 27 × 2 × 30
= 27 × 36 + 27 × 4 + 27 × 60
= 27 × ( 36 + 4 + 60 )
= 27 × 100 = 2700
b) 125 × 25 × 5 × 8 × 2 × 4
= ( 125 × 8 ) × ( 25 × 4 ) × ( 5 × 2 )
= 1000 × 100 × 10
= 1000000
c) 125 × 37 × 32 ÷ 4
= 4625 × 32 ÷ 4
= 148 000 ÷ 4
= 37 000
Cbht
