1樓:蘭英發
①15.68-(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;
②0.25×3.2×1.25,
=0.25×4×0.8×1.25,
=(0.25×4)×(0.8×1.25),=1×1,
=1;③9.99×1.01,
=(10-0.01)×1.01,
=10.1-0.0101,
=10.0899;
④4.63×1.4+46.3×0.86,
=46.3×0.14+46.3×0.86,=46.3×(0.14+0.86),
=46.3×1,
=46.3;
⑤17.5÷0.8÷12.5,
=17.5÷(0.8×12.5),
=17.5÷1,
=17.5;
⑥0.9+9.9+99.9+999.9,
=1-0.1+10-0.1+100-0.1+1000-0.1,=(1+10+100+1000)-(0.1+0.1+0.1+0.1),
=1111-0.4,
=1110.6.
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×
2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.
1、計算下面各題。(能簡算的要簡算)15×(3/2+5/3) 〖6/5-(8/1+12/5)〗×7/3
4樓:樂為人師
15×(2/3+3/5)
= 15×2/3+15×3/5
=10+9
=19〖5/6-(1/8+5/12)〗×3/7=[5/6-13/24]×3/7
=7/24×3/7
=1/8
計算下面各題,能簡算的要簡算,並寫出主要的簡算過程.(1)9.06-2.68-0.32(2)(3.06÷0.25+2.76)×0
5樓:褲兜最棒
(1)9.06-2.68-0.32,
=9.06-(2.68+0.32),
=9.06-3,
=6.06;
(2)(3.06÷0.25+2.76)×
0.2,
=(12.24+2.76)×0.2,
=15×0.2,
=3;(3)18-(3
5+4÷25),
=18-(0.6+4×52),
=18-(0.6+10),
=18-10.6,
=7.4;
(4)2.7×1.25+5.3×125%,=2.7×1.25+5.3×1.25,
=(2.7+5.3)×1.25,
=8×1.25,
=10.
遞等式計算(能簡算的要簡算)9 6 0
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....
遞等式計算,能簡便的要簡便
1 25 32 0.25 25 4 2 4 0.25 25 4 4 0.25 2 100 1 2 200 2 0.25 0.4 40 0.25 0.4 40 0.25 0.1 10 10.1 3 0.67 1.28 9.33 0.72 0.67 9.33 1.28 0.72 10 2 12 4 3....
用簡便方法遞等式計算,遞等式計算能簡便的用簡便方法計算謝謝
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 回50 49 48 47 答 46 45 44 43 42 41 40 39 38 37 36 35 4 4 4 4 16 50 49 48 47 46 45 444 43 42 41 40 39 38 ...