计算:(1)4.7-(-8.9)-7.5-(+6);(2)3 1 4 +(-2 3 5 )+5 1 4 +
计算:(1)4.7-(-8.9)-7.5-(+6);(2)314+(-235)+514+(-825);(3)2.7+(-8.5)-(+3.4)-(-1.2);(4)-0....
计算:(1)4.7-(-8.9)-7.5-(+6);(2)3 1 4 +(-2 3 5 )+5 1 4 +(-8 2 5 );(3)2.7+(-8.5)-(+3.4)-(-1.2);(4)-0.6-0.08+ 2 5 -2 5 11 -0.92+2 5 11 .
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(1)4.7-(-8.9)-7.5-(+6) =4.7+8.9-7.5-6 =13.6-13.5 =0.1; (2)3
=3
=3
=8.5-11 =-2.5; (3)2.7+(-8.5)-(+3.4)-(-1.2) =2.7-8.5-3.4+1.2 =3.9-11.9 =-8; (4)-0.6-0.08+
=-0.6+0.4-0.08-0.92-2
=-0.2-1 =-1.2. |
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