答案解析

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4×125×25×0.

8 =(0.

4×25)×(125×0.

8)=10×100=1000 1.

25×(8+10) =1.

25×8+1.

25×10 =10+12.

5=22.

5 9123-(123+8.

8) =9123-123-8.

8=9000-8.

8=8991.

2 1.

24×8.

3+8.

3×1.

76 =8.

3×(1.

24+1.

76) =8.

3×3=24.

9 9999×1001 =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 4821-998 =4821-1000+2 =3823 32×125×25 =4×8×125×25 =(4×25)×(8×125) =100×1000 =100000 9048÷26=(2600+2600+2600+1248)÷26=2600÷26+2600÷26+2600÷26+1248÷26 =100+100+100+48=3482881÷ 43 =(1290+1591)÷ 43 =1290÷43+1591÷43 =30+37 =67 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×(4x0.

4x7.

5-1.

25x4x0.

4)=42.

3×[4×0.

4×(7.

5-1.

25)]=42.

3×[4×0.

4×6.

25]=42.

3×(4×2.

5) =4231.

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 =33 (80-9.

8)×5分之2-1.

32 =70.

2X2/5-1.

32=28.

08-1.

32 =26.

76 8×7分之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 =21 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

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