1. 看图列式计算。


40+3=43
20+5=25
20+5=25
答案
40+3=43
20+5=25
20+5=25
2. 算一算。
80+6=
7+30=
80+6=
86
90-40=50
66-6=60
7+30=
37
31-30=1
2+70=72
9
+40=49 83-3
=80 48-40
=8答案
80 + 6 = 86
90 - 40 = 50
66 - 6 = 60
7 + 30 = 37
31 - 30 = 1
2 + 70 = 72
9 +40 = 49(或写成:□ = 49 - 40 = 9)
83 - 3 = 80(或写成:□ = 83 - 80 = 3)
48 - 40 = 8(或写成:□ = 48 - 8 = 40)
90 - 40 = 50
66 - 6 = 60
7 + 30 = 37
31 - 30 = 1
2 + 70 = 72
9 +40 = 49(或写成:□ = 49 - 40 = 9)
83 - 3 = 80(或写成:□ = 83 - 80 = 3)
48 - 40 = 8(或写成:□ = 48 - 8 = 40)
3. 解决问题。
(1)这个班一共有多少人?

(2)已经搬了多少把椅子?

(1)这个班一共有多少人?
30+5=35(人)
(2)已经搬了多少把椅子?
42-2=40(把)
答案
(1)30+5=35(人)
(2)42-2=40(把)
(2)42-2=40(把)
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