5年级20简算题 计算下面各题(能简算的要简算)25×18×4 25×(40+7) 18×56+44×18 201×41 38×99+38 101×
计算下面各题(能简算的要简算)25×18×4 25×(40+7) 18×56+44×18 201×41 38×99+38 101×
计算下面各题(能简算的要简算)25×18×4 25×(40+7) 18×56+44×18 201×41 38×99+38 101×
(1)25×18×4,=25×4×18,
=100×18,
=1800;(2)25×(40+7),
=25×40+25×7,
=1000+175,
=1175;
(3)18×56+44×18,
=18×(56+44),
=18×100,
=1800;
(4)201×41,
=(200+1)×41,
=200×41+1×41,
=8200+41,
=8241;
(5)38×99+38,
=38×(99+1),
=38×100,
=3800;
(6)101×74-74,
=(101-1)×74,
=100×74,
=7400;
(7)425+21×(12+28),
=425+21×40,
=425+840,
=1265;
(8)15×[120-(42+36)],
=15×[120-78],
=15×42,
=630;
(9)(450÷18-13)×80,
=(25-13)×80,
=12×80,
=960;
(10)600÷[2×(210-180)],
=600÷[2×30],
=600÷60,
=10.
计算下面各题,能简算的要简算: 56×(2÷58?3) [334?(172?4×158)]÷34 [9?(112+18)×24]÷85
(1)
5 6×(2÷
5 8-3),
=
×(2×
8 5-3),
=
×2×
8 5-
5 6×3,
=
?
5 2,
=
?
15 6,
=
;
(2)[
33 4?(
17 2?4×
15 8)]÷
3 4,
=[
-(
17 2-
15 2]÷
3 4,
=
×
4 3,
=9
;
(3)[9-(
1 12+
1 8)×24]÷
8 5,
=[9-(24×
+24×
1 8)]×
5 8,
=[9-5]×
,
=2.5.
计算下面各题,能简算的要简算.(125+7)×8 3200÷25×4 3.27+6.4+2.73+4.6 25×44 6.45-0.58-1.
(1)(125+7)×8,
=125×8+7×8,
=1000+56,
=1056;
(2)3200÷25×4,
=128×4,
=512;
(3)3.27+6.4+2.73+4.6,
=(3.27+2.73)+(6.4+4.6),
=6+11,
=17;
(4)25×44,
=25×4×11,
=100×11,
=1100;
(5)6.45-0.58-1.42,
=6.45-(0.58+1.42),
=6.45-2,
=4.45;
(6)12×(324-285)÷26,
=12×39÷26,
=468÷26,
=18.
计算下面各题(能简算的要简算).807×99+807 [1-(12-14)]×25 20.11×83+1.7×201.1 65×38+58
(1)807×99+807,
=807×(99+1),
=807×100,
=80700;

(2)[1-(
1 2-
1 4)]×
2 5,
=[1-
]×
2 5,
=
×
2 5,
=
;
(3)20.11×83+1.7×201.1,
=20.11×83+17×20.11,
=20.11×(83+17),
=20.11×100,
=2011;
(4)
6 5×
3 8+
5 8÷
5 6.
=
×(
3 8+
5 8),
=
×1,
=
.
(能简便的要简算) 102×45 823-497 18×56+44×18 25×18×4 77×99+77
(1)102×45,=(100+2)×45,
=100×45+2×45,
=4500+90,
=4590;(2)823-497,
=823-(500-3),
=823-500+3,
=323+3,
=326;
(3)18×56+44×18,
=18×(56+44),
=18×100,
=1800;
(4)25×18×4,
=25×4×18,
=100×18,
=1800;
(5)77×99+77,
=77×(99+1),
=77×100,
=7700.
计算下面各题,能简算的要简算. ①2-27-57 ②58-(58-12) ③43-18+712 ④6-(34-25
①2-
2 7-
5 7,
=2-(
+
5 7),
=2-1,
=1;
②
5 8-(
5 8-
1 2),
=
-
5 8+
1 2,
=
;
③
4 3-
1 8+
7 12,
=
+
7 12,
=
;
④6-(
3 4-
2 5),
=6-
,
=5
.
计算下面各题,能简算的要简算. (125+7)×8 3.27+6.4+2.73+4.6 25×44 12×(324-285
(1)(125+7)×8,=125×8+7×8,
=1000+56,
=1056;(2)3.27+6.4+2.73+4.6,
=(3.27+2.73)+(6.4+4.6),
=6+11,
=17;
(3)25×44,
=25×(4×11),
=25×4×11,
=100×11,
=1100;
(4)12×(324-285)÷26,
=12×39÷26,
=468÷26,
=18.
计算下面各题,能简算的就简算.47×4.5-27×4.51.25×3.2×0.80.75×18÷0
①47×4.5-27×4.5
=(47-27)×4.5
=20×4.5
=90;
②1.25×3.2×0.8
=3.2×(1.25×0.8)
=3.2×1
=3.2;
③0.75×18÷0.25
=0.75÷0.25×18
=3×18
=54;
④9.07-22.78÷3.4
=9.07-6.7
=2.37.
计算下面各题(能简算的要简算)1.25×3.2×2.5 1.8×5.6+44×0.18 3.4×99+3.4 101×8.3-8.3 (27
(1)1.25×3.2×2.5,
=(1.25×0.8)×(4×2.5),
=1×10,
=10;
(2)1.8×5.6+44×0.18,
=1.8×(5.6+4.4),
=1.8×10,
=18;
(3)3.4×99+3.4,
=3.4×(99+1),
=3.4×100,
=340;
(4)101×8.3-8.3,
=(101-1)×8.3,
=100×8.3,
=830;
(5)(27÷1.8-11)×2.5,
=(15-11)×2.5,
=4×2.5,
=10;
(6)39.4×[0.96÷(5.4÷0.9)],
=39.4×[0.96÷6],
=39.4×0.16,
=6.304.
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