Question

有谁能帮我算几道题吗？实在不会十分，十分感谢

Answer 1

第一道题：可以使用乘法结合律
32.6×4/5+32.6×20%=32.6×（0.8+0.2）=32.6×1=32.6
第二道题：同样使用乘法结合律
500/9÷11/5+5/11×589/9=500/9×5/11+5/11×589/9=5/11×（500/9+589/9）=5/11×1089/9=5445/99=605/11=55
第三题：3/4-3/8×8/9+1/3=3/4-1/3+1/3=3/4
第四题： 4/9×【（5/8-5/16）-3/8】=4/9×（10/16-5/16-6/16）=4/9×（-1/16）=-1/36

Answer 2

那道等于0.75的，很简单啊。
3/4-3/8×8/9+1/3
=3/4-(3/9-1/3)
=0.75-(1/3-1/3)
=0.75

Answer 3

②500/9÷11/5+5/11×589/9
=500/9×5/11+5/11×589/9
=5/11×(500/9+589/9)
=5/11×121
=55
③3/4-3/8×8/9+1/3
=3/4-1/3+1/3
=3/4
=0.75
④4/9×[(5/8-5/16)-3/8]
=4/9×[5/8-5/16-3/8]
=4/9×[2/8-5/16]
=4/9×(4-5)/16
=4/9×(-1/16)
=-1/36