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脱式计算简算题四年级 脱式计算,能简算的要简算.3.5×4.5×4; 12.6-1.9+1.9-3

火烧 2021-10-29 07:58:10 1181
脱式计算,能简算的要简算.3.5×4.5×4; 12.6-1.9+1.9-3 脱式计算,能简算的要简算.3.5×4.5×4; 12.6-1.9+1.9-3 (1)3.5×4.5×4=3.5×(4.5×

脱式计算,能简算的要简算.3.5×4.5×4; 12.6-1.9+1.9-3  

脱式计算,能简算的要简算.3.5×4.5×4; 12.6-1.9+1.9-3

(1)3.5×4.5×4
=3.5×(4.5×4)
=3.5×18
=63;

(2)12.6-1.9+1.9-3.39
=12.6-3.39+(1.9-1.9)
=9.21+0
=9.21;

(3)1÷[0.1÷(1.43-0.93)]
=1÷(0.1÷0.5)
=1÷0.2
=5;

(4)4.4×4.6+5.4×4.4
=(4.6+5.4)×4.4
=10×4.4
=44.

脱式计算(能简算的要简算):①8.7-3.8×3.5÷1.9②218×9.25+598×3

①8.7-3.8×3.5÷1.9,
=8.7-3.8÷1.9×3.5,
=8.7-2×3.5,
=8.7-7,
=1.7;

21 8

×9.25+

59 8

×

37 4


=

21 8

×9.25+

59 8

×9.25,
=(

21 8

+

59 8

)×9.25,
=10×9.25,
=92.5;

③3×(

2 15

+

1 12

)-

2 5


=3×

2 15

+3×

脱式计算简算题四年级 脱式计算,能简算的要简算.3.5×4.5×4; 12.6-1.9+1.9-3
1 12

-

2 5


=

2 5

+

1 4

-

2 5


=

1 4

1 2

+

1 6

+

1 12

+

1 20

+

1 30

+

1 42

+

1 56

+

1 72

+

1 90


=1-

1 2

+

1 2

?

1 3

+

1 3

-

1 4

+…+

1 9

-

1 10


=1-

脱式计算,能简算的要简算9-1.9×(4.7-4.5) 8.65-3.7+

(1)9-1.9×(4.7-4.5),
=9-1.9×0.2,
=9-0.38,
=8.62;

(2)8.65-3.7+1.35-6.3,
=(8.65+1.35)-(3.7+6.3),
=10-10,
=0;

(3)1.2+36÷[20×(0.1-0.05)],
=1.2+36÷[20×0.05],
=1.2+36÷1,
=37.2;

(4)(16.5×3+3×7.5)÷6,
=(16.5+7.5)×3÷6,
=24×3÷6,
=12.

脱式计算.(能简算的要简算)2.5×(1.9+1.9+1.9+1.9)19×99+992.5×13×0.4 1 12 ÷(

(1)2.5×(1.9+1.9+1.9+1.9),
=2.5×(1.9×4),
=2.5×4×1.9,
=10×1.9,
=19;
(2)19×99+99,
=(19+1)×99,
=20×99,
=1980;
(3)2.5×13×0.4,
=(2.5×0.4)×13,
=1×13,
=13;
(4)

1 12

÷(

1 4

+

1 6

),
=

1 12

÷(

3 12

+

2 12

),
=

1 12

÷

5 12


=

1 12

×

12 5


=

1 5

脱式计算:(能简算的要简算)12.8+1.9+15.94;7.69+(4.76-1.9

(1)12.8+1.9+15.94,
=14.7+15.94,
=30.64;

(2)7.69+(4.76-1.96),
=7.69+2.8,
=10.49;

(3)4.68+2.72+7.32,
=(4.68+7.32)+2.72,
=12+2.72,
=14.72;

(4)25.06-2.65-8.35,
=25.06-(2.65+8.35),
=25.06-11,
=14.06.

计算,能简算的要简算:2.38×1.9+7.62×1.9 &...

(1)2.38×1.9+7.62×1.9
=1.9×(2.38+7.62)
=1.9×10
=19

(2)5.7×5-8.52 
=28.5-8.52
=19.98 
 
(3)0.96×101
=0.96×(100+1)
=0.96×100+0.96×1
=96+0.96
=96.96

脱式计算,能简算的要简算: 46.5×99+46.5 12.5÷2.5÷0.4  2.6×1.9÷2.6×1.9 (7.7+

(1)46.5×99+46.5
=46.5×(99+1)
=46.5×100
=4650
(2)12.5÷2.5÷0.4
=12.5÷(2.5×0.4)
=12.5÷1
=12.5
(3)2.6×1.9÷2.6×1.9
=2.6÷2.6×1.9×1.9
=1×1.9×1.9
=3.61
(4)(7.7+1.54)÷0.7
=9.24÷0.7
=13.2
(5)10.8÷[(4.62-1.92)×4]
=10.8÷[2.7×4]
=10.8÷10.8
=1
(6)2.6×(2.139÷9.3×6.2)
=2.6×(0.23×6.2)
=2.6×1.426
=3.7076

脱式计算(能简算的要简算) 3.4÷[(1.2+0.5)×5] 1.9+19.9

(1)3.4÷[(1.2+0.5)×5],
=3.4÷[1.2×5+0.5×5],
=3.4÷[6+2.5],
=3.4÷8.5,
=0.4;

(2)1.9+19.9+199.9+0.3,
=1.9+19.9+199.9+(0.1+0.1+0.1),
=(1.9+0.1)+(19.9+0.1)+(199.9+0.1),
=2+20+200,
=222.

  
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