Page 11 - 바빠 교과서 연산_2-1_정답

정답과 풀이
정답

39단계 92쪽 42단계 98쪽

① 8, 8, 19 ② 7, 7, 25 ③ 9, 9, 16 ①
43 7
④ 8, 8, 26 ⑤ 30, 23, 17 ⑥ 30, 31, 24 - 35
28 8
⑦ 40, 32, 28 ⑧ 50, 36, 28

②
40단계 93쪽
50 27
① 2, 2, 8 ② 4, 4, 6 ③ 2, 2, 28 62 - 38 24
④ 5, 5, 15 ⑤ 35, 10, 6 ⑥ 24, 40, 37
⑦ 33, 40, 38 ⑧ 42, 50, 44 ③

64 45
- 38
40단계 94쪽 83 16

① 2, 2, 18 ② 4, 4, 16 ③ 3, 3, 37
④ 5, 5, 15 ⑤ 27, 30, 28 ⑥ 32, 40, 34

⑦ 43, 40, 38 ⑧ 64, 30, 27

41단계 95쪽 .
넷째 마당 덧셈과 뺄셈의 관계, 세 수의 계산
① 1, 1, 7 ② 1, 1, 15 ③ 1, 1, 14 43단계 101쪽

④ 1, 1, 33 ⑤ 20, 25, 27 ⑥ 40, 14, 16
① 13 ② 16, 16 ③ 28, 24
⑦ 50, 13, 16 ⑧ 40, 32, 35
④ 34, 70, 34 ⑤ 84, 84, 25

41단계 96쪽
43단계 102쪽
① 3, 3, 18 ② 2, 2, 18 ③ 3, 32, 3, 35
① 16 ② 14, 41 ③ 36, 36
④ 2, 2, 23 ⑤ 30, 16, 19 ⑥ 30, 42, 43
④ 48, 48 ⑤ 63, 63, 29
⑦ 20, 63, 66 ⑧ 50, 46, 48

44단계 103쪽
42단계 97쪽
① 11, 9 ② 25, 6
① 18 ② 27 ③ 23 ④ 38
③ 19, 52 ④ 18, 60
⑤ 43, 43, 27 ⑥ 74, 74, 28, 46

⑦ 91, 54, 37, 91, 37, 54
⑧ 82, 68, 14, 82, 14, 68

149