﹙9分之7+3分之2×6分之5﹚÷15分之4 51.6 ÷[﹙3.4-1.25﹚×0.4]急
问题描述：
﹙9分之7+3分之2×6分之5﹚÷15分之4 51.6 ÷[﹙3.4-1.25﹚×0.4]急
答
﹙7/9+2/3×5/6﹚÷4/15
=(7/9+5/9﹚÷4/15
=4/3×15/4
=5
51.6 ÷[﹙3.4-1.25﹚×0.4]
=51.6÷﹙3.4×0.4-1.25×0.4)
=51.6÷(1.36-0.5)
=51.6÷0.86
=60
答
﹙9分之7+3分之2×6分之5﹚÷15分之4
=（7/9+5/9）*15/4
=4/3*15/4
=5
51.6 ÷[﹙3.4-1.25﹚×0.4]
=51.6/（2.15*0.4）
=51.6/0.86
=60