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题型:填空题 题类:常考题 难易度:容易
万以内笔算加法(不含连加) 2499 10
121+657=
401+78=
{#blank#}1{#/blank#}
450+370{#blank#}1{#/blank#}800 674-139{#blank#}2{#/blank#}545 520+280{#blank#}3{#/blank#}820+250
620{#blank#}4{#/blank#}270+350 1200{#blank#}5{#/blank#}800+210 189+42{#blank#}6{#/blank#}265-34
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