1.-7²+2x(-3)²+(-6)÷(-1/3)²2.-1-{(-3)³-[3+0.4x(-1 1/2)] ÷(-2)}↑负一又二分之一
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1.-7²+2x(-3)²+(-6)÷(-1/3)²2.-1-{(-3)³-[3+0.4x(-1 1/2)] ÷(-2)}↑负一又二分之一
1.-7²+2x(-3)²+(-6)÷(-1/3)²
2.-1-{(-3)³-[3+0.4x(-1 1/2)] ÷(-2)}
↑负一又二分之一
1.-7²+2x(-3)²+(-6)÷(-1/3)²2.-1-{(-3)³-[3+0.4x(-1 1/2)] ÷(-2)}↑负一又二分之一
1.-7²+2x(-3)²+(-6)÷(-1/3)²
=-49+18+(-6)÷1/9
=-31-54
=-85
2.-1-{(-3)³-[3+0.4x(-1 1/2)] ÷(-2)}
↑负一又二分之一
=-1-{-27-[3-0.6] ÷(-2)}
=-1-{-27-2.4÷(-2)}
=-1-{-27+1.2}
=-1+25.8
=24.8
1. -7²+2x(-3)²+(-6)÷(-1/3)²
=7²﹢2×3²+﹙﹣6﹚÷1/9
=49+18+﹙﹣6﹚×9
=49+18-54
=13
2.-1-{(-3)³-[3+0.4x(-1 1/2)] ÷(-2)}
=﹣1-﹛﹣27-[3+2/5×﹙﹣3/2﹚]×﹙﹣1/2﹚...
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1. -7²+2x(-3)²+(-6)÷(-1/3)²
=7²﹢2×3²+﹙﹣6﹚÷1/9
=49+18+﹙﹣6﹚×9
=49+18-54
=13
2.-1-{(-3)³-[3+0.4x(-1 1/2)] ÷(-2)}
=﹣1-﹛﹣27-[3+2/5×﹙﹣3/2﹚]×﹙﹣1/2﹚﹜
=﹣1-﹛﹣27-12/5×﹙﹣1/2﹚﹜
=﹣1-﹛﹣27+6/5﹜
=﹣1+27-1.2
=24.8
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1.原式= -14+2X9+(-6)÷(1/9)
= -14+18+(-6)X9
= -14+18-54 =-50
2. = -1 { (-27) - [ 3 + 0.4 X( -3/2 )] ÷(-2)}
= -1{(-27)- 【 3 - 3/5 】÷ (-2) ...
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1.原式= -14+2X9+(-6)÷(1/9)
= -14+18+(-6)X9
= -14+18-54 =-50
2. = -1 { (-27) - [ 3 + 0.4 X( -3/2 )] ÷(-2)}
= -1{(-27)- 【 3 - 3/5 】÷ (-2) }
= -1 {(-27)- 5/12 ÷ (-2)}
= -1{ (-27)+ 5/24 }
= -1X(-643/24)
=643/24
纯手工打的啊!LZ给分吧!
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