③77.4-36.12=41.28(米)
3、185×5.4=999(千米)
4、0.8×24×18=19.2×18=345.6(元)
第四页:
5、324×1.2+48=388.8+48=436.8(元)
提高篇:
1、28
2、392.6×192-39260×0.927.5×23+31×2.5
=392.6×192-392.6×92=2.5×(3×23)+31×2.5 =392.6×(192-92)=2.5×(69+31)
=392.6×100=2.5×100
=39260=250
3、0.79×0.46+7.9×0.24+11.4×0.079
=0.79×0.46+0.79×2.4+1.14×0.79
=0.79×(0.46+2.4+1.14)
=0.79×4
=3.16
第五页:
1、>,<,<,<,>,>
2、32.37.7
3、0.832.46
4、0.56×101=0.56×100+0.56×1=56+0.56=56.56 2.37×0.5×4=2.37×(0.5×4)=2.37×2=4.74