20+90=
500+300=
5000+3000=
6000+2000=
10+ 1000=
3000+4000=
30+4000=
60+600=
50+60=
80-30=
100- 10=
300-200=
1 10-90=
280-60=
430- 100=
5500-3000=
5500-300=
1000-500=
6000-4000=
7500-2000=
27÷3=
7×5=
8×4=
7×8=
8×9=
6×9=
28÷7=
36÷4=
40÷8=
6×9=
7×7=
32○32
47○5 1
63○60
12 1○ 1 12
4360○3890
1000○999
10+4054○4205
425○424+ 10
5005○5050
12÷4×5=
6×4÷3=
5× 1×6=
3+3÷ 1=
30+30÷6=
7 1- 10+9=
40-8+5=
12+ 12÷3=
200-25÷5=
12-3+4=
73-6×7=
62-54÷6=
28-28÷4=
64+27- 18=
8×9÷8=
3×4+ 10
10+3×4=
3×4- 10=
20-3×4=
40+60-20=
14÷2×6=
32+8×6=
70-28- 12=
8×3-3=
63÷( )=9
8×( )=32
63-( )=30
5×( )=20
( )×2=6
17+( )=34
48-( )= 19
7×5=( )
54-( )=2 1
29+( )=7 1
42+( )=75
48-( )= 10
29=5×( )+4
60-( )=23
88-( )=24
47+( )=60
25-( )=8
50-( )=24
37+( )= 100
24+( )=62
( )×7=63
6×( )=36
49÷( )=7
78+22=
30+46=
82+ 14=
47+33=
63-30=
74-25=
78-34=
45- 19=
25+38=
2 1- 18=
54+ 18=
38+9=
70-37=
54-26=
72-63=
94-78=
25- 17=
34+48=
60-37=
88-64=
39+7=
34+48=
50-26=
17+47=
37+63=
2. Written calculation
( 1)862+78= (2) 184-98= (3) 170+60= (4)520-80= (5)820+80=
(6)535+25= (7) 138+42= (8) 136-60= (9) 140-56= ( 10) 145-55=
( 1 1)565+ 148= ( 12)423+ 153= ( 13)300+430= ( 14)273+330= ( 15)576-225=
( 16) 166- 1 10= ( 17)520+ 123= ( 18)9 1 1+ 10 1= ( 19) 136+ 145= (20) 166+ 198=