小学简算题 计算下列各题,能简算就简算.8-2.8×0.1513.75÷0.125-2.751.53
计算下列各题,能简算就简算.8-2.8×0.1513.75÷0.125-2.751.53
计算下列各题,能简算就简算.8-2.8×0.1513.75÷0.125-2.751.53
①8-2.8×0.15
=8-0.42
=7.58;
②13.75÷0.125-2.75
=110-2.75
=107.25;
③1.53+23.4÷7.2
=1.53+3.25
=4.78;
④5×17.8×0.8
=17.8×(5×0.8)
=17.8×4
=71.2;
⑤9.9×2.5
=(10-0.1)×2.5
=10×2.5-0.1×2.5
=25-0.25
=24.75;
⑥5.5×17.33+2.67×5
=95.315+13.35
=108.665.
计算下列各题,能简算就简算.25×32×125=______; &nbs...
(1)25×32×125,
=(25×4)×(8×125),
=100×1000,
=100000;
(2)4×
2 7+4×
5 7,
=4×(
+
5 7),
=4×1,
=4;
(3)
1 5÷[(
2 3+
1 5)×15],
=
÷[
2 3×15+
1 5×15],
=
÷[10+3],
=
÷13,
=
×
1 13,
=
;
(4)12×(
1 4+
1 6?
1 3),
=12×
+12×
1 6?12×
1 3,
=3+2-4,
=1.
计算下列各题,能简算的要简算.12%50×0.125×0.02×80.8×(4-3.75)×9.90.8
(1).50×0.125×0.02×8,
=(50×0.02)×(0.125×8),
=1×1,
=1;
(2).0.8×(4-3.75)×9.9,
=0.8×0.25×9.9,
=0.2×9.9,
=0.2×(10-0.1),
=0.2×10-0.2×0.1,
=2-0.02,
=1.98;
(3)0.81×99+0.81,
=0.81×99+0.81×1,
=0.81×(99+1),
=0.81×100,
=81;
(4)25×(85+85+85+85),
=25×4×85,
=100×85,
=8500.
计算下列各题.14-6.46-3.54(简算)8
(1)14-6.46-3.54,
=14-(6.46+3.54),
=14-10,
=4;
(2)

8 17
×
1 19+
1 19×
9 17,
=(
+
9 17)×
1 19,
=1×
,
=
;
(3)(
3 4-
1 3)÷
2 3×
1 6,
=
×
3 2×
1 6,
=
;
(4)[1-(
1 2+
1 3)]×36,
=[1-
]×36,
=
×36,
=6.
用脱式计算下列各题(能简算的要简算) 6.4×1.25×12.5 1.7×9.9+0.17 [(2+2.8
(1)6.4×1.25×12.5,=8×0.8×1.25×12.5,
=(8×1.25)×(0.8×12.5),
=10×10,
=100;(2)1.7×9.9+0.17,
=1.7×9.9+1.7×0.1,
=1.7×(9.9+0.1),
=1.7×10,
=17;
(3)[(2+2.8)÷0.6-1.5]×0.04,
=[4.8÷0.6-1.5]×0.04,
=[8-1.5]×0.04,
=6.5×0.04,
=0.26.
计算下列各题,能简算的要简算.(307-208)÷11 &n...
(1)(307-208)÷11,
=99÷11,
=9;
(2)276-178+22,
=276+22-178,
=298-178,
=120;
(3)25×33×4,
=25×4×33,
=100×33,
=3300;
(4)18×(537-488),
=18×49,
=882;
(5)420÷14÷5,
=420÷(14×5),
=420÷70,
=6;
(6)184+45+16,
=184+16+45,
=200+45,
=245.
计算下列各题,能简算的要简算.2.56÷0.04÷0.5 1.92÷0.12-2.7 37
(1)2.56÷0.04÷0.5,
=2.56÷(0.04×0.5),
=2.56÷0.02,
=128;
(2)1.92÷0.12-2.7,
=16-2.7,
=13.3;
(3)37.3-1.5÷0.24,
=37.3-6.25,
=31.05;
(4)7.52×0.65÷0.752,
=7.52÷0.752×0.65,
=10×0.65,
=6.5.
计算下列各题(能简算要简算):2100÷35+65×81 280+(28...
(1)2100÷35+65×81,
=60+5265,
=5325;
(2)280+(280-280÷70),
=280+(280-4),
=280+276,
=556;
(3)(75+240)÷(20-5),
=315÷15,
=21.