再过半个月就要过年了,寒假也不远了吗,同学们在玩乐的同时不能忘记写寒假作业,下面小编为大家带来2019年人教版四年级数学寒假作业答案,希望对同学们有帮助!
一、计算题(能简便的要简便)
(280+320)÷[(40-30)×2]
=600÷[10×2]
=600÷20
=30
(7×8715+3×8715)÷15
=(7+3)×8715÷15
=10×8715÷15
=87150÷15
=5810
4500÷25÷4
=4500÷(25×4)
=4500÷100
=45
35×38+35×62+65×39+35×39
=35×(38+62)+39×(65+35)
=35×100+39×100
=100×(35+39)
=100×74
=7400
320×25÷16
=320÷16×25
=20×25
=500
125×88
=125×8×11
=1000×11
=11000
102×208-102×108
=102×(208-108)
=102×100
=10200
101×399-399
=399×(101-1)
=399×100
=3
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