3
圈一圈，算一算


16 - 7 = □
□ + 7 = 16
13 - 8 = □
□ + 8 = 1313 - 6 = □□ + 6 = 1314 - 9 = □□ + 9 = 148 + □ = 1414 - 8 = □7 + □ = 1515 - 7 = □□ + 6 = 1111 - 6 = □看图写算式14 - □ = □14 - □ = □□ + □ = 1415 - □ = □15 - □ = □□ + □ = 1548 + 9 =16 - 8 =4 + 7 =6 + 9 =14 - 7 =13 - 5 =6 + 4 =8 + 3 =5 + 7 =8 + 6 =17 - 7 =14 - 8 =3 + 9 =8 + 4 =12 - 7 =15 - 6 =13 - 8 =7 + 9 =8 + 7 =13 - 2 =6 + 7 =13 - 7 =8 + 5 =13 - 9 =2 + 9 =11 - 9 =6 + 8 =14 - 6 =5 + 11 =12 - 8 =
算一算，连一连

3.
圈一圈（图略）
$16 - 7 = 9$
$9 + 7 = 16$
$13 - 8 = 5$
$5 + 8 = 13$
$13 - 6 = 7$
$7 + 6 = 13$（原文顺序问题，按原文位置对应应为$7$和$6$的空格顺序，但逻辑是差与减数关系，这里按正确逻辑对应）
$14 - 9 = 5$
$5 + 9 = 14$
$8 + 6 = 14$
$14 - 8 = 6$
$7 + 8 = 15$
$15 - 7 = 8$
$5 + 6 = 11$
$11 - 6 = 5$
看图写算式
第一幅图：
$14 - 5 = 9$
$14 - 9 = 5$
$5 + 9 = 14$
第二幅图：
$15 - 7 = 8$
$15 - 8 = 7$
$7 + 8 = 15$
4.
$8 + 9 = 17$
$16 - 8 = 8$
$4 + 7 = 11$
$6 + 9 = 15$
$14 - 7 = 7$
$13 - 5 = 8$
$6 + 4 = 10$
$8 + 3 = 11$
$5 + 7 = 12$
$8 + 6 = 14$
$17 - 7 = 10$
$14 - 8 = 6$
$3 + 9 = 12$
$8 + 4 = 12$
$12 - 7 = 5$
$15 - 6 = 9$
$13 - 8 = 5$
$7 + 9 = 16$
$8 + 7 = 15$
$13 - 2 = 11$
$6 + 7 = 13$
$13 - 7 = 6$
$8 + 5 = 13$
$13 - 9 = 4$
$2 + 9 = 11$
$11 - 9 = 2$
$6 + 8 = 14$
$14 - 6 = 8$
$5 + 11 = 16$
$12 - 8 = 4$
连一连（将算式与结果相同的连线，如$8 + 9$与$17$连等，按上述计算结果进行连线操作 ） 。