=(0.4×25)×( 125×0.8)

= 10× 100= 1000

1.25×(8+ 10)

= 1.25×8+ 1.25× 10

= 10+ 12.5=22.5

9 123-( 123+8.8)

=9 123- 123-8.8

=9000-8.8

=899 1.2

1.24×8.3+8.3× 1.76

=8.3×( 1.24+ 1.76)

=8.3×3=24.9

9999× 100 1

=9999×( 1000+ 1)

=9999× 1000+9999× 1

= 10008999

14.8×6.3-6.3×6.5+8.3×3.7

=( 14.8-6.5)×6.3+8.3×3.7

=8.3×6.3+8.3×3.7

8.3×(6.3+3.7)

=8.3× 10

=83

1.24+0.78+8.76

=( 1.24+8.76)+0.78

= 10+0.78

= 10.78

933- 157-43

=933-( 157+43)

=933-200

=733

482 1-998

=482 1- 1000+2

=3823

I32× 125×25

=4×8× 125×25

=(4×25)×(8× 125)

= 100× 1000

= 100000

9048÷268

=(2600+2600+2600+ 1248)÷26

=2600÷26+2600÷26+2600÷26+ 1248÷269

= 100+ 100+ 100+48

=348

288 1÷ 43

=( 1290+ 159 1)÷ 434

= 1290÷43+ 159 1÷43

=30+37

3.2×42.3×3.75- 12.5×0.423× 16

=3.2×42.3×3.75- 1.25×42.3× 1.6

=42.3×(3.2×3.75- 1.25× 1.6)

=42.3×(4×0.8×3.75- 1.25×4×0.4)

=42.3×(4×0.4×2×3.75- 1.25×4×0.4)

= 42.3×(4x 0.4x 7.5- 1.25 x4 0.4)

=42.3×[4×0.4×(7.5- 1.25)]

=42.3×[4×0.4×6.25]

=42.3×(4×2.5)

=4237

1.8+ 18÷ 1.5-0.5×0.3

= 1.8+ 12-0. 15

= 13.8-0. 15

= 13.65

6.5×8+3.5×8-47

=52+28-47

=80-47

(80-9.8) × 2/5- 1.32

=70.2X2/5- 1.32

=28.08- 1.32

=26.76

8×7 4÷[ 1÷(3.2-2.95)]

=8×4/7÷[ 1÷0.25]

=8×4/7÷4

=8/7

2700×(506-499)÷900

=2700×7÷900

= 18900÷900

=2 1

33.02-( 148.4-90.85)÷2.5

=33.02-57.55÷2.5

=33.02-23.02

= 10

( 1÷ 1- 1)÷5. 1

=( 1- 1)÷5. 1

=0÷5. 1

=0

18. 1+(3-0.299÷0.23)× 1

= 18. 1+ 1.7× 1

= 18. 1+ 1.7

= 19.8

Others look for it from books. I wrote 2 1. I agree with 1| Comment 2011-2-116: 44. I know 7788 1 1 | level.

Simple calculation of sixth grade in primary school

1.(1/69+2/7 1) times 23+25 divided by 71.

= 1/69*23+2/7 1*23+25/7 1

= 1/3+(46/7 1+25/7 1)

= 1/3+ 1

=4/3

2.( 1+ 1/2) times (1-kloc-0//2) times (1+ 1/3) times (1-kloc)

=3/2* 1/2*4/3*2/3...* 10/9*8/9

= 1/2* 10/9 (all intermediate ones are invited)

=5/9

3. 1/2 times 3+ 1/3 times 4+...+119 times 20.

= 1/2- 1/3+ 1/3- 1/4+...+ 1/ 19- 1/20

= 1/2- 1/20

=9/20

4. 1/27+505/2727+ 13 13 13/272727

= 1/27+5* 10 1/(27* 10 1)+ 13* 10 10 1/(27* 10 10 1)

= 1/27+5/27+ 13/27

= 19/27

5. 100-98+96-94+....+4-2

=( 100-98)+(96-94)+...(4-2)

= 2+2+...+2 (* * has 25)

=2*25

=50