早教吧作业答案频道 -->数学-->
1、1.25+3/4-5/12-3/82、(1/2-3/4-5/8)除(-5/8)3、7除(-7/12)×(1/2-1/3)
题目详情
1、1.25+3/4-5/12-3/8
2、(1/2-3/4-5/8)除(-5/8)
3、7除(-7/12)×(1/2-1/3)
2、(1/2-3/4-5/8)除(-5/8)
3、7除(-7/12)×(1/2-1/3)
▼优质解答
答案和解析
1.1.25+3/4-5/12-3/8
= 5/4 + 3/4 - 5/12 - 3/8
= 8/4 - 5/12 - 3/8
= (48 - 10 - 9 ) / 24 = 29/24
2.(1/2-3/4-5/8) ÷(-5/8)
= ( 4/8 - 6/8 - 5/8) × (- 8/5)
= -7/8 × (- 8/5) = 7/5
3.7÷(-7/12)×(1/2-1/3)
= 7× (-12/7) × 1/6
= -12 × 1/6
= -2
= 5/4 + 3/4 - 5/12 - 3/8
= 8/4 - 5/12 - 3/8
= (48 - 10 - 9 ) / 24 = 29/24
2.(1/2-3/4-5/8) ÷(-5/8)
= ( 4/8 - 6/8 - 5/8) × (- 8/5)
= -7/8 × (- 8/5) = 7/5
3.7÷(-7/12)×(1/2-1/3)
= 7× (-12/7) × 1/6
= -12 × 1/6
= -2
看了 1、1.25+3/4-5/1...的网友还看了以下: