文档介绍:作业
47+89=
1524+878=
4357-2587
211-85=
≈
86+67=
=
141-87=
35+67=
6253+487
180-69=
≈
69+39=
作业
47+89=
1524+878=
4357-2587
211-85=
≈
86+67=
=
141-87=
35+67=
6253+487
180-69=
≈
69+39=
3516-2978=
=
115-69=
92+85=
3741-1958
95-39=
≈
=
1727+4269= 1536+1976= 1591+5359
≈
=
5416-2758
≈
5726-2859= =
1/ 8
作业
76+54=
564+869=
6537-2758
105-26=
≈
56+48=
=
25-16=
24+97=
653+487
62-48=
≈
64+98=
3256-1987=
=
56-41=
65+98=
3471-1985
65-39=
≈
=
756+869= 563+967= 591+359
≈
=
9614-6785
≈
5465-2973= =
2/ 8
作业
87+54=
1654+869=
8547-5758
112-49=
≈
76+48=
=
134-16=
214+97=
6153+487
162-78=
≈
614+98=
3536-1875=
=
526-41=
165+98=
2771-1888
615-39=
≈
=
7156+869= 5163+967= 5966+359
≈
=
6821-5686
≈
4565-2973= =
3/ 8
作业
168+54=
564+869=
3637-2758
155-67=
≈
254+48=
=
122-86=
214+97=
1653+2487
152-68=
≈
146+98=
3256-1987=
=
69-41=
645+98=
7472-1984
645-97=
≈
=
5516+