初一数学:有理数混合运算【急!在线等!好的加分 加运算过程】
2又3/4-(-1.25)-1又3/8(-125)÷17+(+315)÷17-(-166)÷17-(-1/17)(-240)×(-5又1/5+7又3/8-2又8/15-1...
2又3/4-(-1.25)-1又3/8
(-125)÷17+(+315)÷17-(-166)÷17-(-1/17)
(-240)×(-5又1/5+7又3/8-2又8/15-1/2)
[1又21/24-(3/8+1/16-3/4)×(-64)]÷5
-2.5×(-4.8)×(0.09)÷(-0.27)
(-1)-(1-1/2)÷3×[2-(-3)×(-3)]
虽然很快 可是你阅题了吗?【我这可是试卷订正= =要交的 还漏一题】
补充:5×|-3.2|×5/16+(-2)÷1/3×(-3)
(-2)×(-2)-(-3)×(-3)×1/6
——————————————————
-3×3-(-2)×(-2)×(-2)
(-81)÷2又1/4×(-4/9)÷(-16)
1÷(-2/7)×3/7 展开
(-125)÷17+(+315)÷17-(-166)÷17-(-1/17)
(-240)×(-5又1/5+7又3/8-2又8/15-1/2)
[1又21/24-(3/8+1/16-3/4)×(-64)]÷5
-2.5×(-4.8)×(0.09)÷(-0.27)
(-1)-(1-1/2)÷3×[2-(-3)×(-3)]
虽然很快 可是你阅题了吗?【我这可是试卷订正= =要交的 还漏一题】
补充:5×|-3.2|×5/16+(-2)÷1/3×(-3)
(-2)×(-2)-(-3)×(-3)×1/6
——————————————————
-3×3-(-2)×(-2)×(-2)
(-81)÷2又1/4×(-4/9)÷(-16)
1÷(-2/7)×3/7 展开
1个回答
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2又3/4-(-1.25)-1又3/8
=4-1又3/8
=2又5/8
(-240)×(-5又1/5+7又3/8-2又8/15-1/2)
=-240×(-8又7/30+7又3/8)
=240+56-90
=206
[1又21/24-(3/8+1/16-3/4)×(-64)]÷5
=【1又7/8+5/16×(-64)】÷5
=【15/8-20】÷5
=3/8-4
=3又5/8
-2.5×(-4.8)×(0.09)÷(-0.27)
=-2.5×(-4.8)×(-1/3)
=-2.5×1.6
=-4
(-1)-(1-1/2)÷3×[2-(-3)×(-3)]
=-1-(1/2)÷3×15
=-1-1/6×15
=-1-5/2
=-3又1/2
=4-1又3/8
=2又5/8
(-240)×(-5又1/5+7又3/8-2又8/15-1/2)
=-240×(-8又7/30+7又3/8)
=240+56-90
=206
[1又21/24-(3/8+1/16-3/4)×(-64)]÷5
=【1又7/8+5/16×(-64)】÷5
=【15/8-20】÷5
=3/8-4
=3又5/8
-2.5×(-4.8)×(0.09)÷(-0.27)
=-2.5×(-4.8)×(-1/3)
=-2.5×1.6
=-4
(-1)-(1-1/2)÷3×[2-(-3)×(-3)]
=-1-(1/2)÷3×15
=-1-1/6×15
=-1-5/2
=-3又1/2
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