试题 试卷
题型:解决问题 题类:常考题 难易度:困难
河北省唐山市丰润区2019-2020学年五年级上学期数学期中试卷
①89.3×43+38×89.3+19×89.3
②1.25×32×2.5
③4.68÷4.5×(0.25+0.5)
④20.08+(32﹣0.299÷0.23)
①0.25×2.8
=0.25×(4×0.7)
=0.25×4×0.7
=1×0.7
=0.7
(应用了{#blank#}1{#/blank#}定律)
②51.25×0.8
=(50+1.25)×0.8
=50×0.8+1.25×0.8
=40+1
=41
(应用了{#blank#}2{#/blank#}定律)
①70.8-1.25-1.75
②(8+0.8)×1.25
③21-(3.41+13.8)
④12.5×5.6×0.8
⑤4.1×2.6+2.6×5.9
①6.5×2.8+0.85
②0.25×0.14×40
③1.25×8.8
④0.87×6.59+0.87×3.41
⑤3.91÷(22-19.7)
试题篮