一、口算。
$4×5=$ $8×6=$ $27÷9=$
$38+45=$ $76-48=$ $35÷6=$
$4×4=$ $27+26=$ $19÷5=$
$9×6=$ $3×8=$ $42÷7=$
$82-44=$ $55-29=$ $18÷8=$
$39+52=$ $66+26=$ $27÷6=$
$3×3=$ $9×5=$ $35÷9=$
$61-24=$ $5×7=$ $43÷5=$
$80-56=$ $74-55=$ $10÷4=$
$4×8=$ $7×2=$ $16÷3=$
$4×5=$ $8×6=$ $27÷9=$
$38+45=$ $76-48=$ $35÷6=$
$4×4=$ $27+26=$ $19÷5=$
$9×6=$ $3×8=$ $42÷7=$
$82-44=$ $55-29=$ $18÷8=$
$39+52=$ $66+26=$ $27÷6=$
$3×3=$ $9×5=$ $35÷9=$
$61-24=$ $5×7=$ $43÷5=$
$80-56=$ $74-55=$ $10÷4=$
$4×8=$ $7×2=$ $16÷3=$
答案
$4×5=20$ $8×6=48$ $27÷9=3$
$38+45=83$ $76-48=28$ $35÷6=5······5$
$4×4=16$ $27+26=53$ $19÷5=3······4$
$9×6=54$ $3×8=24$ $42÷7=6$
$82-44=38$ $55-29=26$ $18÷8=2······2$
$39+52=91$ $66+26=92$ $27÷6=4······3$
$3×3=9$ $9×5=45$ $35÷9=3······8$
$61-24=37$ $5×7=35$ $43÷5=8······3$
$80-56=24$ $74-55=19$ $10÷4=2······2$
$4×8=32$ $7×2=14$ $16÷3=5······1$
$38+45=83$ $76-48=28$ $35÷6=5······5$
$4×4=16$ $27+26=53$ $19÷5=3······4$
$9×6=54$ $3×8=24$ $42÷7=6$
$82-44=38$ $55-29=26$ $18÷8=2······2$
$39+52=91$ $66+26=92$ $27÷6=4······3$
$3×3=9$ $9×5=45$ $35÷9=3······8$
$61-24=37$ $5×7=35$ $43÷5=8······3$
$80-56=24$ $74-55=19$ $10÷4=2······2$
$4×8=32$ $7×2=14$ $16÷3=5······1$
二、写出钟面上所表示的时间和经过的时间。

答案
二、6:55 25
7:20 40
8:00 2:35
40 3:15
50 4:05
7:20 40
8:00 2:35
40 3:15
50 4:05
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