1樓:淹了學校
①48-2.3×12,
=48-27.6,
=20.4;
②50×(0.8+0.4),
=50×0.8+50×0.4,
=40+20,
=60;
③7.34×2.1+7.34×7.8+7.34×1.1,=7.34×(2.1+7.8+1.1),
=7.34×10,
=73.4;
④20.5÷1.25÷0.8,
=20.5÷(1.25×0.8),
=20.5÷1,
=20.5;
⑤(8.1-5.4)÷3.6+85.7,
=2.7÷3.6+85.7,
=0.75+85.7,
=86.45;
⑥9.88×9+9.88,
=9.88×(9+1),
=9.88×10,
=98.8.
計算下面各題.(能簡便的要用簡便方法計算)2.3+3.91÷(22-19.7)21.6÷[64.8-(48.6-2.7×2)]0.25×0
2樓:手機使用者
(1)2.3+3.91÷(22-19.7)=2.3+3.91÷2.3
=2.3+1.7
=4(2)21.6÷[64.8-(48.
6-2.7×2)]=21.6÷[64.
8-(48.6-5.4)]=21.
6÷[64.8-43.2]
=21.6÷21.6
=1(3)0.25×0.03×4
=(0.25×4)×0.03
=1×0.03
=0.03
0.13×3.89+0.13×5.11
=0.13×(3.89+5.11)
=0.13×9
=1.17
(5)10.1×87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7
計算下面各題.(能簡算的要簡算)(1)36×17÷51(2)48×125(3)84×184-84×84(4)10000-(59+62)
3樓:斯元駒
(1)36×17÷51,
=612÷51,
=12;
(2)48×125,
=(40+8)×125,
=5000+1000,
=6000;
(3)84×184-84×84,
=84×(184-84),
=84×100,
=8400;
(4)10000-(59+62)×21,
=10000-121×21,
=10000-2541,
=7459.
計算下面各題能簡算的要簡便計算.32÷(11.08-1.48)×0.811.1×3.58+11.1×5.42 17 20 -
4樓:star演奏9wf鰔
(1)32÷(11.08-1.48)×0.8,=32÷9.6×0.8,
=10 3
×0.8,
=8 3
;(2)11.1×3.58+11.1×5.42,=11.1×(3.58+5.42),
=11.1×9,
=99.9;
(3)17
20-3 5
+5 6
,=1 4
+5 6
,=13
12;(4)33 5
+711
-3 5
+411
,=(33 5
-3 5
)+(4
11+7
11),
=3+1,=4.
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,能簡算的要簡算
6樓:庸人自擾
(1)(308-236)÷12×18
=72÷12×18
=6×18
=108;
(2)42×12-750÷25
=504-30
=474;
(3)48×101-48
=48×(101-1)
=48×100
=4800;
(4)9.14-2.47-3.53
=9.14-(2.47+3.53)
=9.14-6
=3.14.
計算下面各題,能簡便的要簡算1.485-720/(15*12) 2.8*(48分一+125) 3.18*10.2
7樓:
1.485-720/(15*12)
=485-4
=481
2.8*(48分一+125)
=8*1/48+8*125
=1000+1/6
3.18*10.2
=18*(10+0.2)
=18*10+18*0.2
=180+3.6
=183.6
脫式計算下面各題(1)8.48÷0.8×0.9(2)615+38.5×7.2+38.5×2.8(3)(12-3.74)÷(8×0.3+2×1.3)
8樓:秋梵茜茜
①8.48÷0.8×0.9,
=10.6×0.9,
=9.54;
②615+38.5×7.2+38.5×2.8,=615+(7.2+2.8)×38.5,
=615+385,
=1000;
③(12-3.74)÷(8×0.3+2×1.3),=8.26÷(2.4+2.6),
=8.26÷5,
=1.652;
④[7.35+2.25×(0.
55-0.15)]÷0.825,=[7.
35+2.25×0.4]÷0.
825,=[7.35+0.9]÷0.
825,
=8.25÷0.825,
=10.
用簡便方法計算下面各題.(1)1500-28-272(2)99×48+48(3)2000÷125÷8(4)77+2.14+23+7.86.
9樓:沫沫
(1)1500-28-272,
=1500-(28+272),
=1500-300,
=1200;
(2)99×48+48,
=(99+1)×48,
=100×48,
=4800;
(3)2000÷125÷8,
=2000÷(125×8),
=2000÷1000,
=2;(4)77+2.14+23+7.86,=(77+23)+(2.14+7.86),=100+10,
=110.
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