试题 试卷
题型：计算题 题类：常考题 难易度：普通
冀教版数学三年级上册 2.7估算 同步练习
889×6 ≈ 1130×7≈ 4×7149≈ 9×598≈
1912×5≈ 38×7≈ 7×71≈ 3×191≈
{#blank#}1{#/blank#}×{#blank#}2{#/blank#}≈{#blank#}3{#/blank#} (元)，{#blank#}4{#/blank#}元＜400元.
答：妈妈带的钱够了.
31×20≈{#blank#}1{#/blank#} 73×9≈{#blank#}2{#/blank#} 52×69≈{#blank#}3{#/blank#}
37×19≈{#blank#}4{#/blank#} 19×91≈{#blank#}5{#/blank#} 88×11 ≈ {#blank#}6{#/blank#}
24×{#blank#}1{#/blank#}＜198 70×{#blank#}2{#/blank#}＜690 80×{#blank#}3{#/blank#}＜492
42×2= 66÷3= 15×4= 80÷8= 5×40=
100÷5= 4×300= 140÷2= 60×9= 202×6≈
640÷8= 320÷4= 16×4= 300÷6= 389×2≈
+ = - = + = - = + =
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