Question

六年级数学问题~~

计算下列各题，能简算的要间算。
写步骤不解释- -
12÷12/13+12/13÷12 2.7×3/5+8.3×3/5-3/5 2/3[7/16×（4/5-4/7)]

8/5[(5/8-5/8×1/2）+3/16]

Answer 1

①＝12×13／12+12/13×1/12
＝13+1/13
=13又1/13
②=（2.7+8.3-1）×3/5
=10×3/5
=6
③=2/3×[7/16×4/5-7/16×4/7]
=2/3×[7/20-1/4]
=2/3×1/10
=1/15
④=8/5×5/8×（1-1/2）+8/5×3/16
=1/2+3/10
=4/5

Answer 2

1.12*13/12+12/13*1/12=13+1/13 2.(2.7+8.3-1)*3/5=6 3.2/3*7/16*4/5-2/3*7/16*4/7=1/15 4.8/5(5/8-5/8*1/2)+8/5*3/16=1/5