用遞等式計算(怎樣簡便就怎樣計算)

2021-05-20 15:47:40 字數 2924 閱讀 9184

1樓:凌月霜丶

0.25×5×1.6 4.

28+4.72×2.5 3.

14×5.5+0.314×45 19.

72×101-19.72 3.7×4.

85+16.07 (0.718+0.

718+0.718+0.718)×0.

25.(1)0.25×5×1.6

=0.25×5×4×0.4

=(0.25×4)×(5×0.4)

=1×2

=2;(2)4.28+4.72×2.5

=4.28+1.18×4×2.5

=4.28+1.18×(4×2.5)

=4.28+1.18×10

=4.28+11.8

=16.08;

(3)3.14×5.5+0.314×45

=3.14×5.5+3.14×4.5

=3.14×(5.5+4.5)

=3.14×10

=31.4;

(4)19.72×101-19.72

=19.72×(101-1)

=19.72×100

=1972;

(5)3.7×4.85+16.07

=17.945+16.07

=34.015;

(6)(0.718+0.718+0.718+0.718)×0.25=(0.718×4)×0.25

=0.718×(4×0.25)

=0.718×1

=0.718.

遞等式計算,能簡便的要簡便

2樓:★魯魯修

(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)3.18-(0.33+1.18)

=3.18-0.33-1.18

=(3.18-1.18)-0.33

=2-0.33

=1.67;

(5)6.3÷35

=6.3÷(7×5)

=(6.3÷7)÷5

=0.9÷5

=0.18;

(6)[1-(0.5-0.25)]×0.6=[1-0.25]×0.6

=0.75×0.6

=0.45;

(7)7.8×0.9+0.78

=0.78×9+0.78

=0.78×(9+1)

=0.78×10

=7.8;

(8)1.9-1.9×(1.9-1.9)

=1.9-1.9×0

=1.9-0

=1.9.

數學遞等式計算(怎麼簡便怎麼算)

3樓:數學新綠洲

①101×7.8

=(100+1)×7.8

=100×7.8+1×7.8

=780+7.8

=787.8

②六分之五+5.2+六分之一+5.2

=六分之五+六分之一+5.2+5.2

=1+10.4

=11.4

③1.9×32×125×0.25

=1.9×8×125×4×0.25

=1.9×1000×1

=1900

④8.6×三分之二+8.6÷3

=8.6×三分之二+8.6× 3分之1

=8.6×(3分之2+ 3分之1)

=8.6

⑤2.74÷十四分之五+7.26×2.8

=2.74× 5分之14 +7.26× 5分之14=(2.74 +7.26)× 5分之14

=10× 5分之14=28

4樓:天才

①101×7.8=(100+1)×7.8=780+7.8=787.8

②5/6+5.2+1/6+5.2 =(5/6+1/6)+5.2×2=11.4

③1.9×32×125×0.25 =1.9 ×125×(32×0.25)=1.9×(125×8)=1.9×1000=1900

④8.6×2/3+8.6÷3=8.6×2/3+8.6×1/3=8.6×(2/3+1/3)=8.6

⑤2.74÷5/14+7.26×2.8=2.74×2.8+7.26×2.8=(2.74+7.26)×2.8=28

希望樓主採納·~~~

用遞等式計算(怎樣簡便就怎樣計算). 5.4+[8×(6.34-3.59)]0.95×10.1 10.48+

5樓:祐喌炭

(1)5.4+[8×(6.34-3.59)]=5.4+[8×2.75]

=5.4+22

=27.4;

(2)0.95×10.1

=0.95×(10+0.1)

=0.95×10+0.95×0.1

=9.5+0.095

=9.595;

(3)10.48+22.56÷4.7×5.4=10.48+4.8×5.4

=10.48+25.92

=36.4;

(4)4.6÷(0.23×2.5)

=4.6÷0.575=8.

用遞等式計算,怎樣算簡便就怎樣算:①8.4×0.2

6樓:愛_上癮

8.4*0.2

=(84÷10)*(2÷10)

=84*2÷10÷10

=168÷10÷10

=1.68

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