16-47 28-(-74)(3.8)-(+7) (-5.9)—(6.1)(+2/5)-(-3/5) (-2/5)—(-3/5) 1/2-1/3 (-1/2)-1/3 -4.2+5.7-8.4+10 -1/4+5/6
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16-47 28-(-74)(3.8)-(+7) (-5.9)—(6.1)(+2/5)-(-3/5) (-2/5)—(-3/5) 1/2-1/3 (-1/2)-1/3 -4.2+5.7-8.4+10 -1/4+5/6
16-47 28-(-74)
(3.8)-(+7) (-5.9)—(6.1)
(+2/5)-(-3/5) (-2/5)—(-3/5)
1/2-1/3 (-1/2)-1/3
-4.2+5.7-8.4+10 -1/4+5/6+2/3+1/2
12-(-18)+(-7)-15 4.7-(8.9)-7.5+(-6)
数学有理数加减法 过程和答案都要有. 急 答完题给财富悬赏
16-47 28-(-74)(3.8)-(+7) (-5.9)—(6.1)(+2/5)-(-3/5) (-2/5)—(-3/5) 1/2-1/3 (-1/2)-1/3 -4.2+5.7-8.4+10 -1/4+5/6
16-47=-31
28-(-74)=28+74=102
(3.8)-(+7) =3.8-7=-3.2
(-5.9)—(6.1)=-5.9-6.1=-12
(+2/5)-(-3/5)=2/5+3/5=1
(-2/5)—(-3/5)=-2/5+3/5=1/5
1/2-1/3 =1/6
(-1/2)-1/3=-1/2-1/3=-5/6
-4.2+5.7-8.4+10=5.7-4.2-8.4+10=1.5-8.4+10=10+1.5-8.4=3.1
-1/4+5/6+2/3+1/2=5/6+2/3+1/2-1/4=5/6+2/3+(1/2-1/4)=3/2+1/4=7/4
12-(-18)+(-7)-15=12+18-7-15=30-7-15=8
4.7-(8.9)-7.5+(-6)=4.7-8.9-7.5-6=-17.7(最后这道题为什么8.9要括起来,是否还有符号没写)
我要像这样的题。 (-23)-(-27) (-27) 可以长点 1025-(-12) (-1031)=6 154 212-(-15)=381 -214 545 (-245)=86 459 546 4465
16-47=-31
28-(-74)=28+74=102
(3.8)-(+7) =3.8-7=-3.2
(-5.9)—(6.1)=-5.9-6.1=-12
(+2/5)-(-3/5)=2/5+3/5=1
(-2/5)—(-3/5)=-2/5+3/5=1/5
1/2-1/3 =1/6
(-1/2)-1/3=-1/2-1/3=-5/6
...
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16-47=-31
28-(-74)=28+74=102
(3.8)-(+7) =3.8-7=-3.2
(-5.9)—(6.1)=-5.9-6.1=-12
(+2/5)-(-3/5)=2/5+3/5=1
(-2/5)—(-3/5)=-2/5+3/5=1/5
1/2-1/3 =1/6
(-1/2)-1/3=-1/2-1/3=-5/6
-4.2+5.7-8.4+10=5.7-4.2-8.4+10=1.5-8.4+10=10+1.5-8.4=3.1
-1/4+5/6+2/3+1/2=5/6+2/3+1/2-1/4=5/6+2/3+(1/2-1/4)=3/2+1/4=7/4
12-(-18)+(-7)-15=12+18-7-15=30-7-15=8
4.7-(8.9)-7.5+(-6)=4.7-8.9-7.5-6=-17.7(
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16-47=-31
28-(-74)=28+74=102
(3.8)-(+7) =3.8-7=-3.2
(-5.9)—(6.1)=-5.9-6.1=-12
(+2/5)-(-3/5)=2/5+3/5=1
(-2/5)—(-3/5)=-2/5+3/5=1/5
1/2-1/3 =1/6
(-1/2)-1/3=-1/2-1/3=-5/6
...
全部展开
16-47=-31
28-(-74)=28+74=102
(3.8)-(+7) =3.8-7=-3.2
(-5.9)—(6.1)=-5.9-6.1=-12
(+2/5)-(-3/5)=2/5+3/5=1
(-2/5)—(-3/5)=-2/5+3/5=1/5
1/2-1/3 =1/6
(-1/2)-1/3=-1/2-1/3=-5/6
-4.2+5.7-8.4+10=5.7-4.2-8.4+10=1.5-8.4+10=10+1.5-8.4=3.1
-1/4+5/6+2/3+1/2=5/6+2/3+1/2-1/4=5/6+2/3+(1/2-1/4)=3/2+1/4=7/4
12-(-18)+(-7)-15=12+18-7-15=30-7-15=8
4.7-(8.9)-7.5+(-6)=4.7-8.9-7.5-6=-17.7( 应该是
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