-2-5+8=______ 14-25+12-17=_________
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-2-5+8=______ 14-25+12-17=_________
-2-5+8=______ 14-25+12-17=_________
(-28)-(+12)-(-3)-(+6)=
(-25)+(-7)-(-15)-(-6)+(-11)-(-2)=
-2-5+8=______ 14-25+12-17=_________
(-28)-(+12)-(-3)-(+6)=
(-25)+(-7)-(-15)-(-6)+(-11)-(-2)=
-2-5+8=__1__ 14-25+12-17=__-16____
(-28)-(+12)-(-3)-(+6)=43
(-25)+(-7)-(-15)-(-6)+(-11)-(-2)=20
再问: 写出运算的过程
再答: -2-5+8
=-7+8
=1
14-25+12-17
=26-42
=-16____
(-28)-(+12)-(-3)-(+6)
=-28-12+3-6
=-46+3
=-43
(-25)+(-7)-(-15)-(-6)+(-11)-(-2)
=-25-7+15+6-11+2
=-43+23
=20
(-28)-(+12)-(-3)-(+6)=43
(-25)+(-7)-(-15)-(-6)+(-11)-(-2)=20
再问: 写出运算的过程
再答: -2-5+8
=-7+8
=1
14-25+12-17
=26-42
=-16____
(-28)-(+12)-(-3)-(+6)
=-28-12+3-6
=-46+3
=-43
(-25)+(-7)-(-15)-(-6)+(-11)-(-2)
=-25-7+15+6-11+2
=-43+23
=20
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