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题型:口算与估算 题类:常考题 难易度:容易
小学数学西师大版一年级下册 第七单元检测题
60-40 = 24-14 = 59-30= 46-3+8=
62-8 = 27+9= 17+6= 76+6-8=
19+{#blank#}1{#/blank#}=30
25+{#blank#}2{#/blank#}=50
37+{#blank#}3{#/blank#}=80
58+{#blank#}4{#/blank#}=90
43+26={#blank#}1{#/blank#}
43+89={#blank#}2{#/blank#}
50–30= 60–40= 40–40= 10+20=
50+50= 60–30= 40+50= 80–30=
100–20= 60+20= 40+30= 40–10=
50+10= 60–10= 40–20= 10+50=
50–50= 20+60= 70+20= 70–40=
30+20= 90–80= 20–20= 10+80=
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