脫式計算(能簡算的要簡算)1 0 25 0 25 1 2 5 0 1 1 2 3 4 5 6 5 4 3 2 16666662 22

2021-03-27 10:11:05 字數 4533 閱讀 4802

1樓:度鍍

①1÷0.25+0.25÷1-2.5×0.1,=4+0.25-0.25,

=4+(0.25-0.25),

=4+0,

=4;②1+2+3+4+5+6+5+4+3+2+16666662

,=36

6666662

,=18×2

3333331×2

,=18

3333331;③2

2×4+2

4×6+2

6×8+2

8×10

+210×12,=1

2-14+1

4-16+1

6-18+1

8-110+1

10-112,

=12-112,=5

12;④1÷(1-0.99)-99÷(1-0.999),=1÷0.01-99÷0.001,

=100-99000,

=-98900.

脫式計算.(能簡算的要簡算)①1÷0.25+0.25÷1-2.5×0.1② 1+2+3+4+5+6+5+4+3+2+1 6666662

2樓:手機使用者

①1÷0.25+0.25÷1-2.5×0.1,=4+0.25-0.25,

=4+(62616964757a686964616fe78988e69d83313333353336660.25-0.25),

=4+0,

=4;②1+2+3+4+5+6+5+4+3+2+16666662

,=36 6666662

,=18×2

3333331×2

,=18 3333331

;③2 2×4

+24×6

+26×8

+28×10

+210×12

,=1 2

-1 4

+1 4

-1 6

+1 6

-1 8

+1 8

-110

+110

-112

,=1 2

-112

,=512

;④1÷(1-0.99)-99÷(1-0.999),=1÷0.01-99÷0.001,

=100-99000,

=-98900.

脫式計算.(能簡算的要簡算) ①1.258×18.5-0.258×18.5 ②8.48÷0

3樓:薔薇騎士

①bai1.258×

du18.5-0.258×18.5,

zhi=18.5×(1.258-0.258),=18.5×1,

=18.5;dao

②8.48÷內0.8×0.9,

=10.6×0.9,

=9.54;

③1.25×2.4,

=1.25×8×0.3,

=10×0.3,

=3;④容5.85÷(1.3+0.5)×6,=5.85÷1.8×6,

=3.25×6,

=19.5.

脫式計算(能簡算的要簡算

4樓:手機使用者

(1)zhi2.86×0.25+2.86×0.48=0.715+1.3728

=2.0878;

(dao2)9.5÷

內[(1-0.5)÷0.1]

=9.5÷[0.95÷0.1]

=9.5÷9.5

=1;(3)0.77÷35=0.022;

(4)4×12-3x=42

4×12-3x+3x=42+3x

48=42+3x

3x=48-32

3x=6

x=2.容

脫式計算.(能簡算的就簡算)9.4÷[(1.2+1.3)÷0.25](1.2+1.8

5樓:祈兒路過

(du1)9.4÷zhi[(1.2+1.3)÷0.25]=9.4÷[2.5÷0.25]

=9.4÷10

=0.94

(dao2)(1.2+1.8×

內4)×(容7-6.75

=(1.2+7.2)×0.25

=8.4×0.25

=2.1

(3)2.65×1.7+13.5×0.17=2.65×1.7+1.35×1.7

=(2.65+1.35)×1.7

=4×1.7

=6.8

(4)20.4-0.8×0.4-0.68

=20.4-0.32-0.68

=20.4-(0.32+0.68)

=20.4-1

=19.4

脫式計算(能簡算的要簡算)①31315?21314+5215?1114②14.85-1.58×8+31.2÷1.2③2.25×35+2.75÷123+60%

6樓:打鐵王

①313

15-213

14+52

15-1114,

du=(313

15+52

15)-(213

14+11

14),

=9-4,

=5;②14.85-1.58×zhi8+31.2÷1.2,=14.85-12.64+26,

=28.21;

③2.25×3

5+2.75÷12

3+60%,

=2.25×0.6+2.75×0.6+0.6,=(2.25+2.75+1)×dao0.6,=6×0.6,

=3.6;

④1000+999-998-997+996+995-994-993+…內+104+103-102-101,

=(1000+999-998-997)+(996+995-994-993)+…+(104+103-102-101),

=4+4+…+4,

=4×(容900÷4),

=900.

脫式計算.(能簡算的要簡算) 0.125×0.25×8×4 [5-1.7÷(2-1)]×1 87×386 49÷(79+49)×114

7樓:手機使用者

(1)0.125×

源0.25×8×4,

=(0.125×8)×(0.25×4),

=1×1,

=1;(2)[5-1.7÷(2-1)]×1,=[5-1.7÷1]×1,

=[5-1.7]×1,

=3.3×1,

=3.3;

(3)87×386,

=(86+1)×386,

=86×3

86+1×386,

=3+386,

=3386

;(4)4

9÷(79+4

9)×114,

=49÷119

×114,=4

11×114,

=1;(5)3.9÷1.5-2.3×0.5,=2.6-1.15,

=1.45;

(6)112÷3

4-58×1635,

=2-27,

=157.

脫式計算,能簡算的要簡算.21÷0.25÷0.43.5×0.7+5.5×0.7+0.7

8樓:汪天韻

(1)21÷0.25÷0.4,

=21÷(0.25×0.4),

=21÷0.1,

=210;版

(2)3.5×0.7+5.5×0.7+0.7,=(3.5+5.5+1)×權0.7,

=10×0.7,

=7;(3)0.125×3.2×0.25,=0.125×8×0.4×0.25,

=(0.125×8)×(0.4×0.25),=1×0.1,

=0.1;

(4)0.2×9.9+0.1,

=0.2×(10-0.1)+0.1,

=0.2×10-0.2×0.1+0.1,

=2+0.1-0.02,

=2.1-0.02,

=2.08.

請脫式計算,能簡算的要簡算4.85+3.62+1.38+5.15 [16.7-(6.2+9.5)]×8.3 3.25÷0.25+1.75÷0.25

9樓:嚼咬

(1)4.85+3.62+1.38+5.15,du=(zhi4.85+5.15)+(3.62+1.38),dao專=10+5,

=15;

(2)[16.7-(6.2+9.5)]×8.3,=[16.7-15.7]×8.3,

=1×8.3,

=8.3;

(3)3.25÷

屬0.25+1.75÷0.25,

=13+7,

=20;

(4)10.52-(3.52-1.7),

=10.52-3.52+1.7,

=7+1.7,

=8.7.

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