=(0.4×25)×(125×0.8)
=10×100=1000
2 1.25×(8+10)
=1.25×8+1.25×10
=10+12.5=22.5
3 9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
4 1.24×8.3+8.3×1.76
=8.3×(1.24+1.76)
=8.3×3=24.9
5 9999×1001
=9999×(1000+1)
=9999×1000+9999×1
=10008999
6 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
7 8.3×(6.3+3.7)
=8.3×10
=83
8 1.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78
9 933-157-43
=933-(157+43)
=933-200
=733
10 4821-998
=4821-1000+2
=3823
匿名回答于2021-04-10 20:06:13
匿名回答于2021-10-05 04:57:42