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45-48÷8
=45-6
=39
240÷(65+15)
=240÷80
=3
(43-3)×90
=40×90
=3600
50×(127-27)
=50×100
=5000
47+(28-16)
=47+112
=159
18+43+57
=61+57
=118
13×8×25
=104×25
=800
78÷2+22÷2
=39+11
=50
248-79-148
=169-148
=21
7000÷8÷125
=875÷125
=7
299+131+369
=430+369
=799
25×19×4
=475×4
=1900
680-(80+60)
=680-140
=540
一定要采纳
=45-6
=39
240÷(65+15)
=240÷80
=3
(43-3)×90
=40×90
=3600
50×(127-27)
=50×100
=5000
47+(28-16)
=47+112
=159
18+43+57
=61+57
=118
13×8×25
=104×25
=800
78÷2+22÷2
=39+11
=50
248-79-148
=169-148
=21
7000÷8÷125
=875÷125
=7
299+131+369
=430+369
=799
25×19×4
=475×4
=1900
680-(80+60)
=680-140
=540
一定要采纳
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