一、口算
71−43=        6×4=             32÷6=
7×8=             63−34=       54÷7=
53+28=          4×8=           17÷2=
7×7=             35+27=           23÷3=
62−27=          8×8=            33÷5=
3×5=            44+15=            72÷9=
2×7=            65−36=           51÷8=
36+45=          8×6=             18÷8=
6×9=            74−49=           27÷9=
80−57=          6×2=            34÷4=

$71 - 43 = 28$
$6×4 = 24$
$32÷6 = 5······2$
$7×8 = 56$
$63 - 34 = 29$
$54÷7 = 7······5$
$53 + 28 = 81$
$4×8 = 32$
$17÷2 = 8······1$
$7×7 = 49$
$35 + 27 = 62$
$23÷3 = 7······2$
$62 - 27 = 35$
$8×8 = 64$
$33÷5 = 6······3$
$3×5 = 15$
$44 + 15 = 59$
$72÷9 = 8$
$2×7 = 14$
$65 - 36 = 29$
$51÷8 = 6······3$
$36 + 45 = 81$
$8×6 = 48$
$18÷8 = 2······2$
$6×9 = 54$
$74 - 49 = 25$
$27÷9 = 3$
$80 - 57 = 23$
$6×2 = 12$
$34÷4 = 8······2$

二、( )里最大能填几?
( )$×9 ＜ 63$
$8×$( )$＜ 50$
$33 ＞$( )$×6$
$7×$( )$＜ 49$
( )$×5 ＜ 32$
$36 ＞$( )$×9$
$20 ＞ 8×$( )
( )$×4 ＜ 29$
$3×$( )$＜ 26$
( )$×6 ＜ 35$
$23 ＞$( )$×7$
$5×$( )$＜ 41$
$43 ＞$( )$×9$
$56 ＞ 8×$( )
$7×$( )$＜ 21$

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