计算下面算式4×4=9×9=16×16=3×5=8×10=15×17=
4/5,16/17,16/13,64/37,()[99%]
4/5,16/17,16/13,64/37,()单项选择题 A. 64/25B. 64/21C. 35/26D. 75/23
4/5,16/17,16/13,64/37,()[99%]
4/5,16/17,16/13,64/37,()A.64/25B.64/21C.35/26D.75/23
4/5,16/17,16/13,64/37,()[99%]
4/5,16/17,16/13,64/37,()A.64/25B.64/21C.35/26D.75/23
口算.35×2=17×4=16×4=38×2=120×6=130×7=270×5=480×3=150×5=240×3..[98%]
口算.35×2=17×4=16×4=38×2=120×6=130×7=270×5=480×3=150×5=240×3=260×3=230×4=9×14=2×450=5×16=24×5=250×4=26×3=6×140=270×3=
口算。46×2=17×2=24×3=540÷9=80×4=16×5=400÷5=630÷7=55÷5=360÷4=..[98%]
口算。46×2=17×2=24×3=540÷9=80×4=16×5=400÷5=630÷7=55÷5=360÷4=63÷3=480÷6=
16,21,16*(7/8),20*(1/4) ,17*(3/4) ,19*(1/2)[98%]
16,21,16*(7/8),20*(1/4) ,17*(3/4) ,19*(1/2) 
A. 16*(5/7)
B. 15*(3/5)
C. 21*(3/8)
D. 18*(5/8)
16,21,16*(7/8),20*(1/4) ,17*(3/4) ,19*(1/2)[98%]
16,21,16*(7/8),20*(1/4) ,17*(3/4) ,19*(1/2) 
A. 16*(5/7)
B. 15*(3/5)
C. 21*(3/8)
D. 18*(5/8)
直接写出得数。16÷4=20÷5=36÷6=18÷3=3×5=4×6=72-17=35+49=30÷5=3..[98%]
直接写出得数。 16÷4= 20÷5=36÷6=18÷3=3×5=4×6= 72-17=35+49=30÷5=36-28=75+25=25÷5=
...﹣17﹣(﹣7)+(﹣16);(2)﹣5+6÷(﹣2)×;(3);(4)﹣23+|5﹣8|+2..[97%]
计算:(1)23﹣17﹣(﹣7)+(﹣16);(2)﹣5+6÷(﹣2)×;(3);(4)﹣23+|5﹣8|+24÷(﹣3).