0.4× 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
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
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
=348
288 1÷ 43
=( 1290+ 159 1)÷ 43
= 1290÷43+ 159 1÷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×(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)
=423
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 = 33 (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 Finally, I wish you progress in your study! ! !