2520括號乘以25等於用遞等式計算

2021-03-04 01:38:36 字數 1866 閱讀 6413

1樓:雲山霧海

2/5+7/25×20%括號乘以25等於用遞等式計算(2/5+7/25×20%)x25

=2/5x25+7/25x25x0.2

=10+1.4

=11.4

用遞等式計算(能簡算的要簡算)72×(18+29) (72.5-6.25)×2÷25 1.7×...

2樓:【痞子

(1)72×(18

+29)=72×zhi18

+72×2

9=9+16

=25;

dao(回2)(72.5-6.25)×答2÷25=66.25×2÷25

=132.5÷25

=5.3;

(3)1.7×8.5+0.83+85

=14.45+0.83+85

=15.28+85

=100.28;

(4)95×3

2-710×3

=2710

-2110=35

;(5)54.6-(8.9-5.4)

=54.6-8.9+5.4

=54.6+5.4-8.9

=60-8.9

=51.1;

(6)265+4

5×(9

10-38)

=265+45

×2140

=265

+2150

=28150.

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×

3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

用遞等式計算(能簡算的要簡算) 5.03-2.5+0.96 35.72-(5.9+5.72) 25-4.7+5.3 1.3+2.83+8.7+0.1

4樓:金仁英

(1)5.03-2.5+0.96,

=2.53+0.96,

=3.49;

(2)35.72-(5.9+5.72),

=35.72-5.9-5.72,

=35.72-5.72-5.9,

=30-5.9,

=24.1;

(3)25-4.7+5.3,

=20.3+5.3,

=25.6;

(4)1.3+2.83+8.7+0.17,=(1.3+8.7)+(2.83+0.17),=10+3,

=13;

(5)2.47-2.2-3.8+7.53,=(2.47+7.53)-(2.2+2.8),=10-5,=5.

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