1樓:皽圧殷
(1)9.6÷0.4×0.25,
=24×0.25,
=6;(2)29.7÷(5.85÷0.65),
=29.7÷9,
=3.3;
(3)7.4×9.9,
=7.4×(10-0.1),
=7.4×10-7.4×0.1,
=74-0.74,
=73.26;
(4)3.84-2.7×0.64,
=3.84-1.728,
=2.112;
(5)8.68-8.68÷0.56×0.5,=8.68-15.5×0.5,
=8.68-7.75,
=0.93;
(6)4.7×4.7+4.7+4.3×4.7,=4.7×(4.7+4.3+1),
=4.7×10,
=47.
遞等式計算.(能簡算的要簡算,並寫出必要的過程).①0.125×0.25×8×4 ②(1-0.05)÷1.9
2樓:猴皆翹
①0.125×0.25×8×4,
=0.125×8×(0.25×4),
=1×1,
=1;②(1-0.05)÷1.9+0.1
=0.95÷1.9+0.1,
=0.5+0.1,
=0.6;③89
×34-715×56
=23-718
,=12
18?718,
=518;④8
17÷23+1
23×9
17=8
17×1
23+1
23×917,
=123
×(817
+917
),=1
23×1,
=123;⑤4
29×[1-(34-3
8)]=429
×(1-38),
=429×58
,=558;
⑥3.6-2.8+7.4-7.2.
=3.6+7.4-(2.8+7.2),
=11-10,=1.
遞等式計算(能簡算的要簡算).(1)2.15-2.15×0.8(2)75÷1.25(3)93÷0.25÷
3樓:甫恬謐
(1)2.15-2.15×0.8,
=2.15×(1-0.8),
=2.15×0.2,
=0.43;
(2)75÷1.25,
=75÷(25×0.05),
=75÷25÷0.05,
=3÷0.05,
=60;
(3)93÷0.25÷0.4,
=93÷(0.25×0.4),
=93÷0.1,
=930;
(4)15.6÷(3.9×0.5),
=15.6÷3.9÷0.5,
=4÷0.5,=8.
用遞等式計算(能簡算的要簡便計算) 0.175÷0.25×4.27.52-(7.7-2.48)+32.7.3.2×(2.5+12.5)6.8×
4樓:摯愛慧瑩uj卑
(1)0.175÷0.25×4
=0.7×4
=2.8
(2)27.52-(7.7-2.48)+32.7=27.52-7.7+2.48+32.7
=(27.52+2.48)+(32.7-7.7)=30+25
=55(3)3.2×(2.5+12.5)
=3.2×2.5+3.2×12.5
=0.8×(4×2.5)+0.4×(8×12.5)=0.8×10+0.4×100
=8+40
=48(4)6.8×3.7-3.7+37×0.42=6.8×3.7-3.7+3.7×4.2
=(6.8-1+4.2)×3.7
=10×3.7
=37(5)[(7.6-5.8)×0.8-1]×5.5=[1.8×0.8-1]×5.5
=[1.44-1]×5.5
=0.44×5.5
=2.42
(6)(7.8+2.2×5)÷(4-3.06)=(7.8+11)÷0.94
=18.8÷0.94=20
遞等式計算(能簡算的要簡便運算,遞等式計算(能簡算的要簡便運算) 15 68 (7 78 4 32) 2 32 0 25 3 2 1 25 9 99 1
15.68 7.78 4.32 2.32,15.68 7.78 4.32 2.32,15.68 4.32 7.78 2.32 20 10,10 0.25 3.2 1.25,0.25 4 0.8 1.25,0.25 4 0.8 1.25 1 1,1 9.99 1.01,10 0.01 1.01,10....
14遞等式計算能簡算的要簡算並寫出主要過程
5 7 1 4 9 14 27 28 9 14 9 28 解 5 7 1 4 9 14 10 14 9 14 1 4 1 14 1 4 2 28 7 28 9 28 遞等式計算,寫出必要的計算過程,能簡便計算的用簡便方法計算 1 7.06 2.4 5.7 2 5.4 99 5.4 1 7.06 2....
計算。(能簡算的要簡算)脫式計算 能簡算的要簡算
1 3.6 8 17 17分之3乘3 3.6 8 17 9 17 3.6 17 17 3.6 1 2.6 2 3又11分之3 1又4分之3 3又11分之3 36 11 7 4 36 11 36 11 4 7 11 36 4 7 3 125 125 8 8 0 1 8 8 0 4 8又5分之4乘8又9...