一、连一连。

一、

二、在$◯$里填“＞”“＜”或“=”。
$33+17◯ 50$         $31+9◯ 63-18$         $28◯ 38-17+9$
$62◯ 88-29$         $35+15◯ 25+25$         $32-18+16◯ 30$
$27+14◯ 31$         $44-18◯ 12+13$         $47+23-25◯ 55$
$5× 3◯ 20$         $16◯ 7× 3-6$         $8× 5-8◯ 32$
$7× 6◯ 42$         $6× 3+9◯ 30$         $2× 6-9◯ 2$
$9÷ 3◯ 3$         $5× 9+8◯ 55$         $9× 5-8◯ 35$

$33+17=50$
$31+9＜63-18$
$28＜38-17+9$
$62＞88-29$
$35+15=25+25$
$32-18+16=30$
$27+14＞31$
$44-18＞12+13$
$47+23-25＜55$
$5×3＜20$
$16＞7×3-6$
$8×5-8=32$
$7×6=42$
$6×3+9＜30$
$2×6-9＞2$
$9÷3=3$
$5×9+8＜55$
$9×5-8＞35$

三、在（）里填合适的数。
$36+(\_\_\_\_\_\_)=50$         $24=(\_\_\_\_\_\_)-17$         $32+9+(\_\_\_\_\_\_)=62$
$62=(\_\_\_\_\_\_)-16$         $32-(\_\_\_\_\_\_)=15$         $36+14-(\_\_\_\_\_\_)=15$
$28+(\_\_\_\_\_\_)=31$         $70-(\_\_\_\_\_\_)=23$         $45-16-(\_\_\_\_\_\_)=16$
$5×(\_\_\_\_\_\_)=35$         $(\_\_\_\_\_\_)× 4+9=33$         $(\_\_\_\_\_\_)× 5-9=36$
$40÷(\_\_\_\_\_\_)=8$         $(\_\_\_\_\_\_)× 3+9=30$         $(\_\_\_\_\_\_)× 9-8=28$
$(\_\_\_\_\_\_)× 6=42$         $(\_\_\_\_\_\_)× 8+4=76$         $(\_\_\_\_\_\_)× 7-4=45$

14；41；21
78；17；35
3；47；13
7；6；9
5；7；4
7；9；7