随便来两道数学题! 简单的!脱试计算的,解答出来!谢谢!
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/17 04:59:34
随便来两道数学题! 简单的!脱试计算的,解答出来!谢谢!
第一题:10.65-7.17-2.83+9.35
=(10.65+9.35)-(7.17-2.83)
=20-10
=10
第二题:4.48÷{(4.3-3.6)×0.8}
=4.48÷(0.7×0.8)
=4.48÷0.56
=8
第三题:7/12÷{3/4×(1/3+1/4)
=7/12÷(3/4×7/12)
=7/12÷7/16
=7/12×16/7
=4/3
第四题:7/9×3/11+2/9÷11/3
=7/9×3/11+2/9×3/11
=3/11×(7/9+2/9)
=3/11×1
=3/11
=(10.65+9.35)-(7.17-2.83)
=20-10
=10
第二题:4.48÷{(4.3-3.6)×0.8}
=4.48÷(0.7×0.8)
=4.48÷0.56
=8
第三题:7/12÷{3/4×(1/3+1/4)
=7/12÷(3/4×7/12)
=7/12÷7/16
=7/12×16/7
=4/3
第四题:7/9×3/11+2/9÷11/3
=7/9×3/11+2/9×3/11
=3/11×(7/9+2/9)
=3/11×1
=3/11