北师大版三年级上册数学《整理和复习》巩固应用
4.
45+15x3 80÷4+36 871-381+129
126-96÷3 5x(36-19) (83-35)÷4
答案：
45+15x3
=45+45
=90
80÷4+36
=20+36
=56
871-381+129
=490+129
=619
126-96÷3
=126-32
=94
5x(36-19)
=5x17
=85
(83-35)÷4
=48÷4
=12
北师大版三年级上册数学《整理和复习》巩固应用
4.
45+15x3 80÷4+36 871-381+129
126-96÷3 5x(36-19) (83-35)÷4
答案：
45+15x3
=45+45
=90
80÷4+36
=20+36
=56
871-381+129
=490+129
=619
126-96÷3
=126-32
=94
5x(36-19)
=5x17
=85
(83-35)÷4
=48÷4
=12