数学题”有好心人帮忙算一下!简便420 ÷ 20287 ÷ 72600 ÷ (13X4)53000 ÷10623X164 ÷ 41540 ÷ 60

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数学题”有好心人帮忙算一下!简便420÷20287÷72600÷(13X4)53000÷10623X164÷41540÷60数学题”有好心人帮忙算一下!简便420÷20287÷72600÷(13X4)

数学题”有好心人帮忙算一下!简便420 ÷ 20287 ÷ 72600 ÷ (13X4)53000 ÷10623X164 ÷ 41540 ÷ 60
数学题”有好心人帮忙算一下!
简便
420 ÷ 20
287 ÷ 7
2600 ÷ (13X4)
53000 ÷106
23X164 ÷ 41
540 ÷ 60

数学题”有好心人帮忙算一下!简便420 ÷ 20287 ÷ 72600 ÷ (13X4)53000 ÷10623X164 ÷ 41540 ÷ 60
420 ÷ 20
=7×60÷ 20
=7×(60÷ 20)
=7×3
=21
287 ÷ 7
=(280+7)÷ 7
=280÷ 7+7 ÷ 7
=40+1
=41
2600 ÷ (13X4)
=2600 ÷ 13÷4
=200÷4
=50
53000 ÷106
=53000 ÷(53x2)
=53000 ÷53÷2
=1000÷2
=500
23X164 ÷ 41
=23X(164 ÷ 41)
=23x4
=92
540 ÷ 60
=54÷6
=9

21
41
50
500
92
9

21 41 50 500 92 9