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

2021-03-17 01:39:45 字數 2426 閱讀 4684

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

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