解:42x125x8x5等于( 210000 )
∵已知需求出42x125x8x5等于多少
∴42 x 125 x 8 x 5
= 42 × (125 × 8)× 5
= 42 × 1000 × 5
= 42000 × 5
= 210000
答:42x125x8x5等于210000
标题可以先算125×8等于1000。然后再算
42×5×1000=210000
42x125x8x5
=125x8x42x5
=1000x210
=210000
原式=(42×5)×(125×8)
=210×1000
=210000
42x125x8x5
=42x5x(125x8)
=210x1000
=210000