2025年学评手册三年级数学上册北师大版第25页答案
1. 算算练练
45 ÷ 5 + 14 = ______
14 + 7 × 7 = ______
37 + 4 × 9 = ______
28 + 64 - 27 = ______
(89 - 68) ÷ 3 = ______
100 - (18 + 62) = ______

答案

1. 45 ÷ 5 + 14
= 9 + 14
= 23
2. 14 + 7 × 7
= 14 + 49
= 63
3. 37 + 4 × 9
= 37 + 36
= 73
4. 28 + 64 - 27
= 92 - 27
= 65
5. (89 - 68) ÷ 3
= 21 ÷ 3
= 7
6. 100 - (18 + 62)
= 100 - 80
= 20
2. 下面的图分别是谁看到的？连一连

答案


(1)

(2)

3. 数一数下面的图形里各有几个小正方体

(______)个
(______)个
(______)个
(______)个

答案

4
6
5
7