1樓:凌月霜丶
2.5×(3.8×0.4) 4.6×0.33+5.4×0.33
= 3.8*(2.5*0.4) =0.33*(4.6+5.4)
=3.8*1 =0.33*10
=3.8 =3.3
0.25×39+0.25 8.36-2.48-3.52
= 0.25*(39+1) =8.36-(2.48+3.52)
= 0.25*40 =8.36-6
=10 =2.36
2樓:
2.5×(3.8×0.4)
= 2.5x0.4x3.8
=1x3.8
= 3.8
4.6×0.33+5.4×0.33
=(4.6+5.4)x0.33
=10x0.33
=3.3;
0.25×39+0.25
=0.25x(39+1)
=0.25x40
=10;
8.36-2.48-3.52
=8.36-(2.48+3.52)
=8.36-6
=2.36.
供參考。
用遞等式計算,能簡便計算的要用簡便方法計算. 38%× 3 5 +0.4× 19 50 89
3樓:楓島
(1)38%×3 5
+0.4×19
50,=0.38×0.6+0.4×0.38,
=(0.6+0.4)×0.38,
=0.38;
(2)89×6.3+48.9×0.37,
=560.7+18.093,
=578.793;
(3)134
11-(22 3
-1711
),=134
11+17
11-22 3
,=15-22 3
,=121 3
;(4)2.5×3 7
×0.4×21 3
,=(2.5×0.4)×(3 7
×7 3
),=1×1,
=1;(5)158-92+42-8,
=(158+42)-(92+8),
=200-100,
=100;
(6)83.2÷(83.2÷11),
=83.2÷83.2×11,
=11.
用遞等式計算(能簡便計算的用簡便方法計算):(1)4.2÷0.25(2)1.46+(7.7+0.54)+2.3(3)(4.77+1.
脫式計算 (能用簡便方法的簡便計算)①2.07÷2.5÷0.4 ②21.36÷0.8-12.9 ③0.125×32×2.5 ④0.65×201
4樓:喬叔總攻
①2.07÷2.5÷0.4,
bai=2.07÷(du2.5×zhi0.4),=2.07÷1,
=2.07;
dao②21.36÷0.8-12.9,
=26.7-12.9,
=13.8;
③0.125×32×2.5,
=0.125×8×4×2.5,
=(0.125×8)×(4×2.5),
=1×10,
=10;
④0.65×201,
=0.65×(200+1),
=0.65×200+0.65×1,
=130+0.65,
=130.65;
⑤1.2×2.5+8×0.25,
=1.2×2.5+0.8×2.5,
=(1.2+0.8)×2.5,
=2×2.5,
=5;⑥50.4×19+50.4,
=50.4×(19+1),
=50.4×20,
=1008.
脫式計算,能簡便的要簡便計算. 14-11.3-1.7 54÷2.5÷0.4 3.2×0.2
5樓:泡沫
(1)14-11.3-1.7,
=14-(11.3+1.7),
=14-13,
=1;(2)54÷2.5÷0.4,
=54÷(2.5×0.4),
=54÷1,
=54;
(3)3.2×0.28+0.28×6.8,=(3.2+6.8)×0.28,
=10×0.28,
=2.8;
(4)80.3-33.3×0.5÷0.37,=80.3-16.65÷0.37,
=80.3-45,
=35.3.
6樓:買群刀仕
3.6÷0.4-1.2×5
=9-6=3
90÷【3.6-1.8】=90/1.8=50
【31.6-11.7】÷2.
5÷0.4=【31.6-11.
7】÷(2.5*0.4)=【31.
6-11.7】÷1=31.7-0.
1-11.7=19.9
3.4×7.8÷3.9=3.4*(7.8÷3.9)=3.4*2=6.8
5.23×4+4.77÷0.25=5.23×4+4.77×4=(5.23+4.77)×4=10×4=40
基本思路就是結合法,分子分母同時放大等倍數
法,再簡單?那就用筆挨個做除法吧!這些很容易理解的,你可以好好的看一下!
遞等式計算,能簡便計算的一定要簡便計算.25×40.1 12.5×3.2 100.d8÷d (0.25+0.25+0.2
7樓:鄭雨328丶
(1)25×45.1
=25×(45+5.1),
=25×45+25×5.1,
=155+2.5,
=152.5;
(2)12.5×手.2
=12.5×5.8×4,
=15×4,
=45;
(手)155.t8÷t
=(tt+1.t8)÷t.
=tt÷t+1.t8÷t,
=11+5.22,
=11.22;
(4)(5.25+5.25+5.25)×4=手×(5.25×4),
=手×1,
=手;(5)5.84÷2.5÷5.4
=5.84÷(2.5×5.4),
=5.84÷1,
=5.84.
用遞等式的格式計算(能簡算的可以用簡便方法計算)7.2÷1.8+6.8×0.53.7+6.3÷0.6-0.43.5÷〔(0.45-0.3
8樓:百度使用者
(1)7.2÷1.8+6.8×0.5,
=4+3.4,
=7.4;
(2)3.7+6.3÷0.6-0.4,
=3.7+10.5-0.4,
=14.2-0.4,
=13.8;
(3)3.5÷[(0.45-0.38)×0.1],=3.5÷(0.07×0.1),
=3.5÷0.007,
=500;
(4)5.6×7.2+4.4×7.2,
=(5.6+4.4)×7.2,
=10×7.2,
=72.
用遞等式計算,能簡便的要簡便計算
1 200 5.2 du30 200 156 44 zhi2 3.8 dao3.5 6.2 3.5 3.8 6.2 內3.5 10 3.5 35 3 9 101 9 100 1 9 100 9 900 9 909 4 4.536 容0.8 14 5.67 14 0.405 用遞等式計算,能簡便的要簡...
用遞等式計算,能簡便計算的要簡便計算0
1 0.125 0.5 0.8,0.125 0.8 0.5,0.1 0.5,0.05 2 60.4 0.8 12.8,48.32 12.8,35.52 3 2.8 0.6 0.35,2.8 0.21,3.01 4 0.2 2.5,0.2 4 2.5 4 0.8 10,0.08 5 104 0.45,...
用遞等式計算,能簡便的要用簡便方法計算,寫出必要的計算過程
1 7280 280 12,du 7280 3360,zhi 3920 dao2 1650 78 222 350,1650 350 78 222 版 2000 300,1700 3 1230 6 15 13,205 195,400,4 41 982 760 38 41 982 20 41 1002,...