基础强化第1题答案
143;114;221;369
基础强化第2题答案
①64 + 36 + 365
=100 + 365
=465
②43 + 57 +169
=100 + 169
=269
③660 + 100 + 1
=760 + 1
=761
④456+44+92
=500+92
=592
⑤100+4+358
=100+358+4
=458+4
=462
⑥(361+439)+(72+128)
=800+200
=1000
拓展应用第3题答案
面粉:551
糯米:406
大米:692
拓展应用:4题答案
78 + 125 + 122
= 78 + 122 + 125
= 200 + 125
= 325(千米)