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最好列式!能简便的要简便!4/5×3/4--4/5÷475×7/8+25÷8/799×99/1002/3÷3/7--1/3÷3/72/5÷2/9+3/5÷2/91/121÷(3/11+1/22)11/13÷(11/13×3/8)(1/12+1/18)÷1/65/9÷(1/4--1/5)1/3÷3+3÷1/3(7/8+3/4)÷1/21/9×7/15+8

题目详情
最好列式!能简便的要简便!
4/5×3/4--4/5÷4 75×7/8+25÷8/7 99×99/100 2/3÷3/7--1/3÷3/7
2/5÷2/9+3/5÷2/9 1/121÷(3/11+1/22) 11/13÷(11/13×3/8)
(1/12+1/18)÷1/6 5/9÷(1/4--1/5) 1/3÷3+3÷1/3
(7/8+3/4)÷1/2 1/9×7/15+8/15÷9
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▼优质解答
答案和解析
4/5×3/4--4/5÷4 75×7/8+25÷8/7 99×99/100 2/3÷3/7--1/3÷3/7
=4/5×3/4--4/5×1/4 =75×7/8×+25×7/8 =(100-1)×99/100 =2/3×7/3-1/3×7/3
=4/5×(3/4--1/4) =7/8×(75+25) =(100×99/100)-(1×99/100) =7/3×(2/3-1/3)
=2/5 =87.5 =9801/100 =7/9
2/5÷2/9+3/5÷2/9 1/121÷(3/11+1/22) 11/13÷(11/13×3/8)
=2/5×9/2+3/5×9/2 = 1/121÷7/22 =11/13÷104/33
=9/2×(2/5+3/5) =22/847 =8/3
=9/2
(1/12+1/18)÷1/6 5/9÷(1/4--1/5) 1/3÷3+3÷1/3
=(1/12×6)+(1/18×6) =5/9÷1/20 =1/3×1/3+3×3
=5/6 =100/9 =82/9
(7/8+3/4)÷1/2 1/9×7/15+8/15÷9
=(7/8×2)+(3/4×2) = 1/9×7/15+8/15×1/9
=13/4 =1/9×(7/15+8/15)
=1/9
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