核心提示： 北师大三年级数学上册《买文具》练一练 5. 45÷5+14 =9+14=239x7-30 =63-30=3345+15÷3 =45+5=5072÷9-8 =8-8=020+6x6 =20+36=5615-48÷8=15-6=9
北师大三年级数学上册《买文具》练一练
5.
45÷5+14
=9+14
=23
9x7-30
=63-30
=33
45+15÷3
=45+5
=50
72÷9-8
=8-8
=0
20+6x6
=20+36
=56
15-48÷8
=15-6
=9