7/8×21/16+1/2还有这一道:3/8+8/3-1/2

问题描述:

7/8×21/16+1/2
还有这一道:3/8+8/3-1/2

7/8×21/16+1/2=(7*21)/(8*16)+0.5=147/128+0.5=1.648
3/8+8/3-1/2=0.375+2.66667-0.5=2.542

7/8×21/16+1/2=(7×21)/(8×16)+0.5=147/128+0.5=1.648
3/8+8/3-1/2=73/24-1/2=61/24

211/128
61/24
您都三级了

分别是161/128 ; 61/24