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12点六乘以125%加3又五分之二除以五分之四加1.4乘...

12.6×125%+3又5分之2÷5分之4+1.4×12.5 =12.6×125%+3.4×4分之5+1.4×12.5 =12.6×1.25+3.4×1.25+14×1.25 =1.25×(12.6+3.4+14) =1.25×30 =37.5

八分之一乘以三又七分之二加三又七分之五乘以0.125加125乘以0.001 =八分之一乘以三又七分之二加三又七分之五乘以0125加0.125 =1/8×(3又2/7+3又5/7+1) =1/8×8 =1

1.25乘9分之2加1又9分之1除5分之4减百分之125乘3分之1 =1.25乘9分之2加1又9分之1×4分之5减百分之125乘3分之1 =1.25×(2/9+1又1/9-1/3) =1.5×1 =1.25

等于4

二又八分之三乘以一又四分之一+1.25乘以八分之五+百分之125 =二又八分之三×1.25+1.25×八分之五+1.25 =1.25×(2又3/8+5/8+1) =1.25×4 =5

0.75-2又3/4+0.125+12又5/7-4又1/8-6又5/7 =(0.75-2又3/4)+(0.125-4又1/8)+(12又5/7-6又5/7) =-2-4+6 =0

(-0.125)^12*[-1(2/3)]^7*(-8)^13*(-3/5)^9 =(-1/8)^12*(-5/3)^7*(-8)^13*(-3/5)^9 =(1/8)^12*(5/3)^7*8^13*(3/5)^9 =(1/8)^12*8^12*8*(5/3)^7*(3/5)^7*(3/5)*2 =8*(3/5)^2 =8*(9/25) =72/25 希望可以采纳,谢谢!

0.125÷12.5%x(2/3+0.5) =0.125x100/12.5x(2/3+0.5) =1x(2/3+0.5) =2/3+1/2 =4/6+3/6 =7/6

(6.9×0.125×1.75)÷(2.3×8分之1×4分之1) =6.9×8分之1×4分之5÷2.3÷8分之1÷4分之1 =6.9÷2.3×(8分之1÷8分之1)×(4分之5÷4分之1) =3×1×5 =15

(1.25×2又2/5-1/2)+125%÷2 =(3-1/2)+125%÷2 =2.5+0.625 =3.125

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