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125×88的简便方法计算 五、用简便方法计算。(要写出简算过程) 1.9+19.9+199.9+0.3 0.25×12.5×3.2 457÷25÷4 6.8-1.36-

火烧 2022-01-26 20:52:05 1087
五、用简便方法计算。(要写出简算过程) 1.9+19.9+199.9+0.3 0.25×12.5×3.2 457÷25÷4 6.8-1.36- 五、用简便方法计算。(要写出简算过程) 1.9+19.9

五、用简便方法计算。(要写出简算过程) 1.9+19.9+199.9+0.3 0.25×12.5×3.2 457÷25÷4 6.8-1.36-  

五、用简便方法计算。(要写出简算过程) 1.9+19.9+199.9+0.3 0.25×12.5×3.2 457÷25÷4 6.8-1.36-

1.9+19.9+199.9+0.3 =2-0.1+20-0.1+200-0.1+0.3=2+20+200-0.3+0.3=222
0.25*12.5*3.2
=0.25*4*12.5*3.2/4=1*12.5*0.8=10
457÷25÷4 =457/(25×4)=457/100=4.57
6.8-1.36-1.64=6.8-3=3.8

1.9+19.9+199.9+0.3用简便计算,怎么简算

把0.3拆成3个0.1,先加到前3个数中去
结果222

125×88的简便方法计算 五、用简便方法计算。(要写出简算过程) 1.9+19.9+199.9+0.3 0.25×12.5×3.2 457÷25÷4 6.8-1.36-

用简便方法计算(要写出简算过程) 64.72+0.57-2.72      0.5×2.5×12.5×6

①64.72+0.57-2.72 
=64.72-2.72+0.57
=62+0.57
=62.57;
 
②0.5×2.5×12.5×64
=(0.5×2)×(2.5×4)×(12.5×8)
=1×10×100
=1000;

1 64

×19+

1 64

×13
=

1 64

×(19+13)
=

1 64

×32
=

1 2

用简便方法计算,并要写出主要的简算过程.①711+15+411+35②12.5×8×4×0.25.

7 11

+

1 5

+

4 11

+

3 5

=(

7 11

+

4 11

)+(

1 5

+

3 5


=1+

4 5

=1

4 5

②12.5×8×4×0.25
=(12.5×8)×(4×0.25)
=100×1
=100.

用简便方法计算(要写出简算过程).3.64+2.7+4.36( 1 4 +, 用简便方法计算(要写出简算过程).3.64+2.7+4.36  ...

(1)3.64+2.7+4.36,
=3.64+4.36+2.7,
=8+2.7,
=10.7;

(2)(

1 4

+

1 6

)×12,
=

1 4

×12+

1 6

×12,
=3+2,
=5.

脱式计算(能简便计算的要写出简算过程).(1)3.64÷4+4.36×25%(2)3.2×25×12.5(3)34÷[56×(37

(1)3.64÷4+4.36×25%
=3.46×

1 4

+4.36×

1 4


=(3.46+4.36)×

1 4


=8×

1 4


=2;

(2)3.2×25×12.5,
=0.8×4×25×12.5,
=(4×25)×(12.5×0.8),
=100×10,
=1000;

(3)

3 4

÷[56×(

3 7

?

3 8

)],
=

3 4

÷[56×

3 56

],
=

3 4

÷3,
=

1 4

用简便方法计算.(要写出简算过程)①10.8-5.9-4.1  ...

①10.8-5.9-4.1,
=10.8-(5.9+4.1),
=10.8-10,
=0.8;

3 4

×8+8×

1 4


=8×(

3 4

+

1 4

),
=8×1,
=8.

用简便方法计算:(要写出简算过程)(1)29+5.28+79+4.72 ...

(1)

2 9

+5.28+

7 9

+4.72,
=(

2 9

+

7 9

)+(5.28+4.72),
=1+10,
=11;
                 
(2)85.7×16+14.3×16,
=(85.7+14.3)×16,
=100×16,
=1600.

1.9+19.9+199.9+0.3怎样简算

2+20+200-0.3+0.3=222

  
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