2026年天天练口算一年级数学下册人教版第7页答案
二、20 以内的退位减法
1
圈一圈，算一算

$12 - 9 = □$
$□ + 9 = 12$
$13 - 9 = □$
$□ + 9 = 13$$$$$16 - 9 = □$$□ + 9 = 16$$18 - 9 = □$$□ + 9 = 18$$
$9 + 6 = □$
$15 - 9 = □$
$9 + 8 = □$
$17 - 9 = □$
$5 + 9 =$
$($
$) - 4 = 6$
$10 - ($
$) = 2$
$2 + 9 =$
$10 - ($
$) = 5$
$($
$) - 7 = 7$
$8 + 9 =$
$($
$) - 7 = 3$
$($
$) - 1 = 9$
$7 + 9 =$
$($
$) - 9 = 1$
$10 - ($
$) = 1$
$6 + 9 =$
$($
$) - 0 = 10$
$($
$) - 6 = 4$
$4 + 9 =$
$($
$) - 5 = 5$
$10 - ($
$) = 7$
$9 + 9 =$
$10 - ($
$) = 6$
$($
$) - 8 = 2$
$3 + 9 =$
$10 - ($
$) = 8$
$10 - ($
$) = 3$

答案

$12 - 9 = 3$
$3 + 9 = 12$
$13 - 9 = 4$
$4 + 9 = 13$
$16 - 9 = 7$
$7 + 9 = 16$
$18 - 9 = 9$
$9 + 9 = 18$
$9 + 6 = 15$
$15 - 9 = 6$
$9 + 8 = 17$
$17 - 9 = 8$
$5 + 9 = 14$
$10 - 4 = 6$
$10 - 8 = 2$
$2 + 9 = 11$
$10 - 5 = 5$
$14 - 7 = 7$
$8 + 9 = 17$
$10 - 7 = 3$
$10 - 1 = 9$
$7 + 9 = 16$
$10 - 9 = 1$
$10 - 9 = 1$
$6 + 9 = 15$
$10 - 0 = 10$
$10 - 6 = 4$
$4 + 9 = 13$
$10 - 5 = 5$
$10 - 3 = 7$
$9 + 9 = 18$
$10 - 4 = 6$
$10 - 8 = 2$
$3 + 9 = 12$
$10 - 2 = 8$
$10 - 7 = 3$