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1.2/7x5/12x14/152.6/11x8/17x51x553.3/8+3/8x99要求:1、简便计算3、格式:2/7x5/12x14/15==
题目详情
1.2/7x5/12x14/15
2.6/11x8/17x51x55
3.3/8+3/8x99
要求:1、简便计算
3、格式:2/7x5/12x14/15
=
=
2.6/11x8/17x51x55
3.3/8+3/8x99
要求:1、简便计算
3、格式:2/7x5/12x14/15
=
=
▼优质解答
答案和解析
1.2/7x5/12x14/15
=(2/7x14/15)x5/12
=4/15x5/12
=1/9
2.6/11x8/17x51x55
=(6/11x55)x(8/17x51)
=30x24
=720
3.3/8+3/8x99
=3/8x(99+1)
=3/8x100
=75/2
=(2/7x14/15)x5/12
=4/15x5/12
=1/9
2.6/11x8/17x51x55
=(6/11x55)x(8/17x51)
=30x24
=720
3.3/8+3/8x99
=3/8x(99+1)
=3/8x100
=75/2
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