1樓:真知改變人生
87.5-(8.5-3.25)
=87.5-8.5+3.25
=79+3.25
=82.25
67.2-3.04-15.7-3.22
=67.2-3.22-(3.04+15.7)=63.98-18.74
=45.24
計算下面各題,怎樣簡便就怎樣計算。 12.5+5.7-7.5 23.04-(8.5+7.25) 3
2樓:瑩星
12.5+5.7-7.5
=(12.5-7.5)+5.7
=5+5.7
=10.7
23.04-(8.5+7.25)
=23.04-15.75
=7.29
3.28+15.74+4.26+1.72
=(3.28+1.72)+(15.74+4.26)=5+20
=2550-18.6-11.4
=50-(18.6+11.4)
=50-30
=2016.72+8.54+3.28
=(16.72+3.28)+8.54
=20+8.54
=28.54
8.94+7.65-6.94
=(8.94-6.94)+7.65
=2+7.65
=9.65
計算下面各題,怎樣簡便就怎樣算.125-25×5÷25 75+3.2+4.8+25 &...
3樓:靜湜揬
(1)125-25×5÷25
=125-125÷25
=125-5
=120;
(2)75+3.2+4.8+25
=75+25+(3.2+4.8)
=100+8
=108;
(3)69.2-6.83-3.17
=69.2-(6.83+3.17)
=69.2-10
=59.2;
(4)125×32
=125×8×4
=1000×4
=4000;
(5)400-(32×8+143)
=400-(256+143)
=400-399
=1;(6)68×28+32×28
=(68+32)×28
=100×28
=2800.
計算下面各題,怎樣算簡便就怎樣算. 9.43-2.6+8.57-3.4 12×( 1 4 + 1 6 - 1 3
4樓:寧寧不哭
(1)9.43-2.6+8.57-3.4,=(9.43+8.57)-(2.6+3.4),=18-6,
=12;
(2)12×(1 4
+1 6
-1 3
) ,=12×1 4
+12×1 6
-12×1 3
,=3+2-4,
=5-4,
=1;(3)375+450÷18×25,
=375+25×25,
=375+625,
=1000;
(4)(4 5
+1 4
)÷7 3
+7 10
,=21 20
÷7 3
+710
,=920
+710
,=2320.
計算下面各題,怎樣簡便就怎樣算. 432÷36+12×23000÷25÷48.46-2.25-3.7572×125135×67-67×35812÷
5樓:離殤必死
(1)432÷36+12×2,
=12+24,
=36;
(2)3000÷25÷4,
=3000÷(25×4),
=3000÷100,
=30;
(3)8.46-2.25-3.75,
=8.46-(2.25+3.75),
=8.46-6,
=2.46;
(4)72×125,
=(8×9)×125,
=8×125×9,
=1000×9,
=9000;
(5)135×67-67×35,
=(135-35)×67,
=100×67,
=6700;
(6)812÷(532-36×14),
=812÷(532-504),
=812÷28,
=29.
計算下面各題,怎樣簡便就怎樣計算25x45x4 20x
25x45x4 25 4 45 100 45 450020x67x5 20 5 67 100 67 6700125x25x20x8 125 8 25 20 1000 500 500 000 23x125x8 23 125 8 23 1000 23 000 250x 57x4 250 4 57 100...
用簡便方法計算下面各題,用簡便方法計算下面各題 59 38 17
風中的紙屑 1.5x105 105 1 0.5 105 52.5 157.5 0.3x2.5x0.4 0.3 1 0.3 4.8x0.25 1.2 4 0.25 1.2 1 1.2 0.78x98 0.78 100 2 78 1.56 76.44 0.5x2.33x8 2.33 4 9.32 1.2...
計算下面各題,你認為怎樣簡便就怎樣算。11分之6一9分之8十
abc柯柯 你好,這個題目主要還是運用加法的交換律,把相同的墳墓加到一起,所以就是6 11 5 11,也就是1 5 9等於4 9。 前覓荷 6 11 8 9 5 11 6 11 5 11 8 9 1 8 9 1 9 計算下面各題,你認為怎樣簡便就怎樣算。12分之23一8分之5一8分之3? 數學愛好者...