一、口算。
$20×2=$
$11×9=$
$43÷5=$
$12×4=$
$93÷3=$
$46÷2=$
$7×8=$
$70-35=$
$62÷8=$
$4×7=$
$36÷6=$
$62÷2=$
$23×3=$
$33-18=$
$55÷6=$
$44÷4=$
$32+19=$
$41×2=$
$17+56=$
$68÷2=$
$42÷7=$
$21×3=$
$30÷3=$
$32×2=$
$69÷3=$
$13×2=$
$54÷8=$
$60÷2=$
$32×3=$
$70÷8=$

$20×2=40$
$11×9=99$
$43÷5=8······3$
$12×4=48$
$93÷3=31$
$46÷2=23$
$7×8=56$
$70-35=35$
$62÷8=7······6$
$4×7=28$
$36÷6=6$
$62÷2=31$
$23×3=69$
$33-18=15$
$55÷6=9······1$
$44÷4=11$
$32+19=51$
$41×2=82$
$17+56=73$
$68÷2=34$
$42÷7=6$
$21×3=63$
$30÷3=10$
$32×2=64$
$69÷3=23$
$13×2=26$
$54÷8=6······6$
$60÷2=30$
$32×3=96$
$70÷8=8······6$

二、在$◯$里填“+”“-”“×”或“÷”。
$4◯11=44$
$64◯2=32$
$12◯4=6◯8$
$20◯4=80$
$99◯3=33$
$11◯3=47◯14$
$63◯3=21$
$34◯2=68$
$30◯3=5◯2$
$14◯7=7$
$63◯27=36$
$44◯2=40◯18$
$42◯18=60$
$22◯4=88$
$11◯2=63◯7$

$4×11=44$
$64÷2=32$
$12×4=6×8$
$20×4=80$
$99÷3=33$
$11×3=47-14$
$63÷3=21$
$34×2=68$
$30÷3=5×2$
$14-7=7$
$63-27=36$
$44÷2=40-18$
$42+18=60$
$22×4=88$
$11-2=63÷7$