脱式计算,能简算的要简算.893+( 594+107 ) 105+298 &n...
脱式计算,能简算的要简算.893+(594+107)105+2985×(17×24)125×16720÷16÷51000-293-707....
脱式计算,能简算的要简算.893+( 594+107 ) 105+298 5×(17×24)125×16 720÷16÷5 1000-293-707.
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(1)893+(594+107)
=(893+107)+594
=1000+594
=1594
(2)105+298
=(100+5)+(300-2)
=(100+200)+(5-2)
=400+3
=403
(3)5×(17×24)
=(5×24)×17
=120×17
=(100+20)×17
=100×17+20×17
=1700+340
=2040
(4)125×16
=(125×8)×2
=1000×2
=2000
(5)720÷16÷5
=720÷(16×5)
=720÷80
=9
(6)1000-293-707
=1000-(293+707)
=1000-1000
=0
=(893+107)+594
=1000+594
=1594
(2)105+298
=(100+5)+(300-2)
=(100+200)+(5-2)
=400+3
=403
(3)5×(17×24)
=(5×24)×17
=120×17
=(100+20)×17
=100×17+20×17
=1700+340
=2040
(4)125×16
=(125×8)×2
=1000×2
=2000
(5)720÷16÷5
=720÷(16×5)
=720÷80
=9
(6)1000-293-707
=1000-(293+707)
=1000-1000
=0
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