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
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
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
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