实践应用第1题答案
45 ÷ 5 + 17
= 9 + 17
= 26
24 + 36 ÷ 6
= 24 + 6
= 30
57 - 42 ÷ 6
= 57 - 7
= 50
24 - 16 ÷ 4
= 24 - 4
= 20
24 ÷ 6 + 30
= 4 + 30
= 34
82 - 72 ÷ 8
= 82 - 9
= 73
实践应用第2题答案
18 + 36 ÷ 6
= 18 + 6
= 24
25 - 54 ÷ 9
= 25 - 6
= 19
28 ÷ 7 + 36
= 4 + 36
= 40
实践应用第3题答案
10 - 27 ÷ 3
= 10 - 9
= 1(个)
达标检测第1题答案
36 ÷ 9 × 5
= 4 × 5
= 20
25 ÷ 5 - 4
= 5 - 4
= 1
36 + 9 × 5
= 36 + 45
= 81
25 - 5 × 4
= 25 - 20
= 5
达标检测第2题答案
(1)50 + 54 ÷ 6(√)
(2)9 × 8 + 25(√)
达标检测第3题答案
(1)12 + 48 ÷ 6
= 12 + 8
= 20(个)
(2)12 - 48 ÷ 6
= 12 - 8
= 4(个)