文档介绍：-×(-)×()÷(-); (-3)×(-5)
2; (-3)2-(-6); (-4×32)-(-4×3) (-8÷23)-(-8÷2)
3.(-2)2-(-52)×(-1)5+87÷(-3)×(-1)
4. -9+5×(-6)-(-4)2÷(-8); 2×(-3)3-4×(-3)+1
5. -8+4÷(-2); 6-(-12)÷(-3); 3•(-4)+(-28)÷7;
(-7)(-5)-90÷(-15); 1÷(-1)+0÷4-(-4)(-1);
18+32÷(-2)3-(-4)2×5. (-12)2÷(-4)3-2×(-1)2n-1;
〔(-2)4+(-4)2•(-1)7〕2m•(53+35).
(-6)-(-7)+(-5)-(+9)
(-5)×(-3 )-15×1 +〔-( )×24〕-7+3-6;
(-3)×(-8)×25; (-616)÷(-28); -100-27;
2.. (1)-+(-1/5) (2) -(-1/4)+1/6 (3)1/3-(-5/6)+2/3
(4) 1/3+(-1/5)+1+2/3 (5)27-18+(-7)-32
(6)+(-1/4)-(-)+1/2
3.(1)-(-)+(-) (2)(-8)-(-15)+(-9)-(-12)
(3)-2/3+(-1/6)-(-1/4)-1/2 (4)3/5-3/2+(-11/4)+13/4
(5).125*3+125*5+25*3+25
4 3/7 × 49/9 - 4/3 8/9 × 15/36 + 1/27
12× 5/6 – 2/9 ×3 8× 5/4 + 1/4 6÷ 3/8 – 3/8 ÷6
4/7 × 5/9 + 3/7 × 5/9 5/2 -( 3/2 + 4/5 )
5 7/8 + ( 1/8 + 1/9 ) 9 × 5/6 + 5/6 3/4 × 8/9 - 1/3
7 × 5/49 + 3/14 6 ×( 1/2 + 2/3 )
8 × 4/5 + 8 × 11/5 31 × 5/6 – 5/6
9/7 - ( 2/7 – 10/21 ) 5/9 × 18 – 14 × 2/7
4/5 × 25/16 + 2/3 × 3/4 14 × 8/7 – 5/6 × 12/15 )
17/32 – 3/4 × 9/24 3 × 2/9 + 1/3
5/7 × 3/25 + 3/7 3/14 ×× 2/3 + 1/6 1/5 × 2/3 + 5/6
9/22 + 1/11 ÷ 1/2 5/3 × 11/5 + 4/3
45 × 2/3 + 1/3 × 15 7/19 + 12/19 × 5/6 1/4 + 3/4 ÷ 2/3
8/7 × 21/1