文档介绍：一、口算
28 +20=
58-6=
66 - 60=
75 — 30=
38 + 40 =
71 + 23 =
89-8=
50 + 24=
4 + 55=
96 - 20=
66 - 60=
38 + 21=
4+36=
64-45=
91-65=
65-22=
91-12=
45-15=
37+45=
48+24=
69+30=
38+27= 99-48=
61-33=
90-56=
59-31=
3+ (
)=73 5+ (
)=70
4 + ()
=17
43 + (
)=93 38 -(
)=8
68 -(
)=48
()-
6 = 50 ()
+ 20 = 66
48=(
)+20
63=(
)+13 72=(
)+70
59=(
)+9
18+9-9 =
12 - 8 + 70 =
70 - 30 + 6 =
46 + 40 + 2 =
99-9-40
= 5 + 70 - 5 =
9 + 7 + 20 =
14 - 5 + 30 =
30 + 6 + 4 =
= 55-5 + 15 =
36 +30 +20=
5 + 55 +20=
13-5 + 50= 82 — 80 +8=
5X4+5=
3X6-3=
6X5+6=
3X4+2=
4X6+2=
6X2+4=
3X5-1=
4X5-3=
6X3-2=
5X4-3=
88-29=
36-24=
47-28=
77-37=
73-12=
36+14=
14+40=
58+15=
78-37=
4X8=
6X5=
6X5=
7X7=
5X7=
8X8=
6X7=
4X9=
6X7=
5X7=
3X9=
8X3=
3X5=
7X8=
4X7=
54+23=
46-25=
42+33=
57-35=
37-19=
38+19=
43-15=
44-12=
65-48=
17+23=
64+36=
64-45=
91-65=
65-22=
91-12=
45-15=
37+45=
48+24=
69+30=
38+27=
99-48=
61-33=
90-56=
59-31=
98-13=
65-24=
77-66=
24-17=
55-28=
48+35=
64+26=
50+36=
71-65=
48-35=
64-26=
64-26=
39+25=
45-15=
68+25=
27+35=
68-25=
90-17=
42+24=
74-19=
29+30=
36-20=
57-26=
29-29=
76-8=
47+16=
54+6=
50+41=
75-19=
80-54=
16+32=
46+3=
26+32=
48+20=
75-36=
72+25=
54+32=
72+25=
60+38=
40-12=
33+12=
26+36=
86+11=
23+16=
90-36=
98+2=
4