计算题 多个有理数的相乘的运算 像脱式计算那样子(-2)X5X(-5)X(-2)X(-10)1-3X(-2)+(-4)X(-5)

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计算题多个有理数的相乘的运算像脱式计算那样子(-2)X5X(-5)X(-2)X(-10)1-3X(-2)+(-4)X(-5)计算题多个有理数的相乘的运算像脱式计算那样子(-2)X5X(-5)X(-2)

计算题 多个有理数的相乘的运算 像脱式计算那样子(-2)X5X(-5)X(-2)X(-10)1-3X(-2)+(-4)X(-5)
计算题 多个有理数的相乘的运算 像脱式计算那样子
(-2)X5X(-5)X(-2)X(-10)
1-3X(-2)+(-4)X(-5)

计算题 多个有理数的相乘的运算 像脱式计算那样子(-2)X5X(-5)X(-2)X(-10)1-3X(-2)+(-4)X(-5)
(-2)X5X(-5)X(-2)X(-10)
=(2X5)X(5X2)X10
=10X10X10
=1000
1-3X(-2)+(-4)X(-5)
=1+6+20
=27

(-2)X5X(-5)X(-2)X(-10)=2X5X5X2X10=1000
1-3X(-2)+(-4)X(-5)=1-(-6)+20=1+6+20=27

(1)(-2)X5X(-5)X(-2)X(-10)
=(-10)X(-5)X(-2)X(-10)
=50X(-2)X(-10)
=(-100)X(-10)
=1000
(2)1-3X(-2)+(-4)X(-5)
=1-(-6)+20
=7+20
=27