4000÷125÷8=4000/(125*8)=4000/1000=4
4200÷4÷25=4200/(25*4)=4200/100=42
32×125=4*8*125=4*1000=4000
350÷14=350/2/7=25
祝学习进步
望采纳 谢谢
4000÷125÷8
=4000÷(125×8)
=4000÷1000
=4
4200÷4÷25
=4200÷(4×25)
=4200÷100
=42
32×125
=4×(8×125)
=4×1000
=4000
350÷14
=350÷7÷2
=50÷2
=25
解:4000÷125÷ 8
=4000÷(125x8)
=4000÷1000
=4
4200÷4÷25
=4200÷(4x25)
=4200÷100
=42
32X125
=4x(8x125)
=4x1000
=4000
350x14
=(350x2)x7
=700X7
=4900
乘法结合律:
4000÷125÷8
=4000÷(125×8)
=4000÷1000
=4。
4200÷4÷25
=4200÷(4×25)
=4200÷100
=42。
32×125
=4×8×125
=4×(8×125)
=4×1000
=4000。
350÷14
=50×7÷(7×2)
=50÷2×(7÷7)
=25。
采纳呦,谢谢!