6(1)25x3又1/3x0.4x3/10 简便运算 (2)4/7+1/5-3/7=4/5 简便运算 (3)6/7x[1
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6(1)25x3又1/3x0.4x3/10 简便运算 (2)4/7+1/5-3/7=4/5 简便运算 (3)6/7x[1/(5/6-1/2)] 简便运算
(1)25x3又1/3x0.4x3/10 简便运算
(2)4/7+1/5-3/7=4/5 简便运算
(3)6/7x[1/(5/6-1/2)] 简便运算
(4)4.67-(2.98+0.67)简便运算
(1)25x3又1/3x0.4x3/10 简便运算
(2)4/7+1/5-3/7=4/5 简便运算
(3)6/7x[1/(5/6-1/2)] 简便运算
(4)4.67-(2.98+0.67)简便运算
![6(1)25x3又1/3x0.4x3/10 简便运算 (2)4/7+1/5-3/7=4/5 简便运算 (3)6/7x[1](/uploads/image/z/17042987-11-7.jpg?t=6%EF%BC%881%EF%BC%8925x3%E5%8F%881%2F3x0.4x3%2F10+%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97+%EF%BC%882%EF%BC%894%2F7%2B1%2F5-3%2F7%3D4%2F5+%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97+%283%296%2F7x%5B1)
(1)25x3又1/3x0.4x3/10 =25×0.4×10/3×3/10=10
(2)4/7+1/5+3/7+4/5 =(4/7+3/7)+(1/5+4/5)=1+1=2
(3)6/7x[1/(5/6-1/2)] =6/7×[1/(5/6-3/6)]=6/7×[1/(2/6)]=6/7×3=18/7
(4)4.67-(2.98+0.67)=4.67-2.98-0.67=4-2.98=1.02
(2)4/7+1/5+3/7+4/5 =(4/7+3/7)+(1/5+4/5)=1+1=2
(3)6/7x[1/(5/6-1/2)] =6/7×[1/(5/6-3/6)]=6/7×[1/(2/6)]=6/7×3=18/7
(4)4.67-(2.98+0.67)=4.67-2.98-0.67=4-2.98=1.02
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