1.(-10)+8x(-2)²-(-4)x(-3) 2.(-2/3+3/4-5/6)x(-12) 3.(-1/2)+3又1/4+2.75+(-6又1/2)4.1/3+(-3/4)+(-1/3)+(-1/4)+18/19 5.{-3-(-7)+(-3)}x[-1又3/4÷3又1/2x(-10又1/2)]-56.-4/5x[(-1/2)÷(0.75-1)+(-2)] 7.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 12:45:51
![1.(-10)+8x(-2)²-(-4)x(-3) 2.(-2/3+3/4-5/6)x(-12) 3.(-1/2)+3又1/4+2.75+(-6又1/2)4.1/3+(-3/4)+(-1/3)+(-1/4)+18/19 5.{-3-(-7)+(-3)}x[-1又3/4÷3又1/2x(-10又1/2)]-56.-4/5x[(-1/2)÷(0.75-1)+(-2)] 7.](/uploads/image/z/1117309-13-9.jpg?t=1.%28-10%29%2B8x%28-2%29%26%23178%3B-%28-4%29x%28-3%29+2.%28-2%2F3%2B3%2F4-5%2F6%29x%28-12%29+3.%28-1%2F2%29%2B3%E5%8F%881%2F4%2B2.75%2B%28-6%E5%8F%881%2F2%294.1%2F3%2B%28-3%2F4%29%2B%28-1%2F3%29%2B%28-1%2F4%29%2B18%2F19+5.%7B-3-%28-7%29%2B%28-3%29%7Dx%5B-1%E5%8F%883%2F4%C3%B73%E5%8F%881%2F2x%28-10%E5%8F%881%2F2%29%5D-56.-4%2F5x%5B%28-1%2F2%29%C3%B7%280.75-1%29%2B%28-2%29%5D+7.)
1.(-10)+8x(-2)²-(-4)x(-3) 2.(-2/3+3/4-5/6)x(-12) 3.(-1/2)+3又1/4+2.75+(-6又1/2)4.1/3+(-3/4)+(-1/3)+(-1/4)+18/19 5.{-3-(-7)+(-3)}x[-1又3/4÷3又1/2x(-10又1/2)]-56.-4/5x[(-1/2)÷(0.75-1)+(-2)] 7.
1.(-10)+8x(-2)²-(-4)x(-3) 2.(-2/3+3/4-5/6)x(-12) 3.(-1/2)+3又1/4+2.75+(-6又1/2)
4.1/3+(-3/4)+(-1/3)+(-1/4)+18/19 5.{-3-(-7)+(-3)}x[-1又3/4÷3又1/2x(-10又1/2)]-5
6.-4/5x[(-1/2)÷(0.75-1)+(-2)] 7.
1.(-10)+8x(-2)²-(-4)x(-3) 2.(-2/3+3/4-5/6)x(-12) 3.(-1/2)+3又1/4+2.75+(-6又1/2)4.1/3+(-3/4)+(-1/3)+(-1/4)+18/19 5.{-3-(-7)+(-3)}x[-1又3/4÷3又1/2x(-10又1/2)]-56.-4/5x[(-1/2)÷(0.75-1)+(-2)] 7.
1.(-10)+8x(-2)²-(-4)x(-3)
=-10+32-12
=10
2.(-2/3+3/4-5/6)x(-12)
=-2/3×12+3/4×12-5/6×12
=-8+9-10
=-9
3.(-1/2)+3又1/4+2.75+(-6又1/2)
=-1/2+3+1/4+2+3/4-6-1/2
=-7+6
=-1
4.1/3+(-3/4)+(-1/3)+(-1/4)+18/19
=1/3-3/4-1/3-1/4+18/19
=-1+18/19
=-1/19
5.{-3-(-7)+(-3)}x[-1又3/4÷3又1/2x(-10又1/2)]-5
=(-3+7-3)×[(-7/4)×(2/7)×(-21/2)]-5
=1×21/4-5
=1/4
6.-4/5x[(-1/2)÷(0.75-1)+(-2)]
=-4/5×[(-1/2)÷(-1/4)-2]
=-4/5×(2-2)
=0