Page 6 - 바빠교과서연산_1-2_정답

정답

② ⑴ 21, 14, 35 ⑵ 12, 10, 22 ⑶ 21, 12, 33 22단계 56쪽

①
20단계 51쪽 6 1 5 6 4 2
+ 1 8 + 3 3 + 3 4
① 2, 5, 7, 77 ② 5, 4, 9, 59 7 9 8 9 7 6
③ 1, 3, 4, 74 ④ 6, 2, 8, 68
②
⑤ 3, 5, 50, 8, 58 ⑥ 4, 2, 80, 6, 86
⑦ 4, 1, 90, 5, 95 ⑧ 5, 2, 90, 7, 97 24+63 56+32 68+21
=87 =88 =89

20단계 52쪽
③
4 2 3 2
① 20, 40, 60, 67 ② 30, 40, 70, 78 + 5 7 27+70 + 6 6
9 9 =97 9 8
③ 20, 50, 70, 77 ④ 5, 20, 80, 8, 88
⑤ 20, 20, 40, 8, 48 ⑥ 30, 60, 90, 7, 97
⑦ 40, 40, 80, 9, 89 ⑧ 2, 20, 70, 9, 79

21단계 53쪽

.
① 4, 31, 35 ② 6, 23, 29 셋째 마당 뺄셈
③ 2, 55, 2, 57 ④ 3, 56, 3, 59
23단계 59쪽
⑤ 20, 37, 39 ⑥ 30, 72, 77
⑦ 40, 92, 3, 95 ⑧ 30, 91, 6, 97 ① 34 ② 27 ③ 43 ④ 74 ⑤ 35
⑥ 74 ⑦ 86 ⑧ 40 ⑨ 53 ⑩ 82
21단계 54쪽 ⑪ 62 ⑫ 93

① 1, 24, 34 ② 7, 38, 98
23단계 60쪽
③ 3, 55, 20, 75 ④ 4, 68, 20, 88
⑤ 40, 28, 40, 68 ⑥ 50, 48, 50, 98 ① 34 ② 72 ③ 41 ④ 82 ⑤ 44

⑦ 60, 37, 60, 97 ⑧ 10, 79, 10, 89 ⑥ 33 ⑦ 64 ⑧ 73 ⑨ 63 ⑩ 55
⑪ 82 ⑫ 96

22단계 55쪽
24단계 61쪽
① 40 ② 39 ③ 75
① 51 ② 42 ③ 84 ④ 75 ⑤ 81
⑥ 63 ⑦ 33 ⑧ 71 ⑨ 60 ⑩ 97

⑪ 56 ⑫ 94

148