求5道加、减、乘、除的和乘方,有理数混合运算.最好是正负数的.
问题描述:
求5道加、减、乘、除的和乘方,有理数混合运算.最好是正负数的.
答
1.(47*397.5+4.7*6025)-2³
=(4.7*3975+4.7*6025)-8
=4.7*(3975+6025)-8
=47000-8
=46992
2.(-2)²-{-(-5²)}
=4-25
=-21
3.[-7/2]+5/6+[-0.5]+4/5+19/6
=5/6+19/6-7/2-0.5+5/4
=1.25
4 1.125+[-17/5]+[-1/8]+[-0.6]= -3
5.[-|98|+76+(-87)]*23+23*[56+(-75)-(7)]-(8+4+3)
=-3450