一、口算。
$20÷5=$
$36+36=$
$16÷4=$
$7×5=$
$40÷8=$
$6×9=$
$24÷4=$
$35÷7=$
$4×8=$
$36÷4=$
$32÷4=$
$8×2=$
$18÷3=$
$55-37=$
$7×7=$
$43+27=$
$52-36=$
$54÷6=$
$76-39=$
$72÷8=$
$8×3÷4=$
$14÷7×4=$
$6×8-20=$
$36÷6×3=$
$8×5+26=$
$4×2×9=$
$3×9-12=$
$25+48-30=$
$4×7+28=$
$48÷6÷4=$

1.4
2.72
3.4
4.35
5.5
6.54
7.6
8.5
9.32
10.9
11.8
12.16
13.6
14.18
15.49
16.70
17.16
18.9
19.37
20.9
21.6
22.8
23.28
24.18
25.66
26.72
27.15
28.43
29.56
30.2

二、在 $□$ 里填合适的数。
$32 ÷ 7 = □ ··· ··· 4$
$20 ÷ □ = 3 ··· ··· 2$
$□ ÷ 9 = 6 ··· ··· 3$
$48 ÷ 5 = □ ··· ··· 3$
$32 ÷ □ = 5 ··· ··· 2$
$□ ÷ 8 = 3 ··· ··· 5$
$58 ÷ 7 = □ ··· ··· 2$
$46 ÷ □ = 9 ··· ··· 1$
$□ ÷ 7 = 6 ··· ··· 3$
$□ ÷ 7 = 9 ··· ··· 3$
$16 ÷ □ = 3 ··· ··· 1$
$□ ÷ □ = 5 ··· ··· 8$
$□ ÷ 4 = 7 ··· ··· 2$
$55 ÷ □ = 7 ··· ··· 6$
$□ ÷ □ = 4 ··· ··· 8$

1.4
2.6
3.57
4.9
5.6
6.29
7.8
8.5
9.45
10.66
11.5
12.53、9
13.30
14.7
15.44、9